1. Temporal (Time) Problems
1.1 Mumm-ra and Grune's purported ages
In various episodes, Mumm-ra is claimed to be an Egyptian mummy-priest, apparently from the period of time when the Pyramids were constructed (circa 2000 B.C.). His age is sometimes suggested to be 2000 years in quite a few episodes. Therefore, if Mumm-ra is actually an Egyptian mummy-priest, and is 2000 years old, then that means that the Thundercats universe exists around 1A.D. Since there are robot bears with freewill, and space travel, we can logically assume that either Mumm-ra's age has been miscalculated, and/or he is not an Egyptian mummy-priest.
Corroborating this statement is the fact that around 1A.D. there were a few large human societies, including the Romans. Certainly these groups should have shown up.
Hower, Mumm-ra has fought Wiz-ra, apparently in Ancient Egypt. Since it is said that Wizz-ra can only resurface every 7000 years, Mumm-ra could be at least 7000 years old. Mumm-Ra's age is -never- directly stated only vaguely hinted at; in fact the best indication is that Mumm-Ra is at least 7,000 years old.  This age is based on Mumm-Ra's telling of his last battle with Wiz-Ra.  This battle resulted in Wiz-Ra being sent to the 7th dimension which, of course, Wiz-Ra can only escape from once every 7000 years. This would then prove that Mumm-Ra himself must be at least that old and is likely even older.¹

However, it is not really likely that this period of time (given that any sort of genetic engineering would have surfaced around the present day, leaving only about 2000-3000 years to both produce a new genetic strain, and then move that new race to a far-flung planet in the next galaxy, with warp drive and such not being feasible.

Then, we have the problem of Grune (the Ghost warrior)'s age. In the episode Ghost Warrior, it is stated clearly several times that Grune terrorized people centuries ago (making him hundreds of years old). Also, Jaga fought Grune, and, they were once friends. We shall now set some ages for time reference:

Jaga (who fought Grune at one time).......±60
..............(when fighting Grune)....±45-50
Claudus and Jaga are the same age, by the way...

To disprove that Grune actually terrorized people centuries before the time of the Thundercats, we should compare the features of Jaga and Grune, who fought at one time. Jaga was already showing signs of aging (gray hair, etc.), while Grune was still shockingly young. In fact, Grune would appear to be around 30 years old.
What confuses this entire point is that the current Thundercats have no recollection of Grune, even though Grune apparently fought Jaga in their time (logically, then the eldest Thundercats, Lynx-O, Tygra, Panthro, and Cheetara should know at least of Grune).
Therefore, Grune has been the victim of a miscalculation of age. With the evidence before us, there should be no way that Grune could live hundreds of years (especially when he was a mortal being up until his exportion to Third Earth). If Grune were hundreds of years old, that would make Jaga hundreds of years old, as well as Claudus (who is the same age as Jaga). Claudus then would logically not be able to father Lion-O.

1.3 Lion-O's mysterious aging in the suspension capsule [Exodus]
This one has puzzled a lot of fanfiction writers, and viewers of the show. How is it that Lion-O aged so dramatically, while his companions did not noticeably age? There are two major possibilities:
a. Jaga purposely did not include enough suspension gas within Lion-O's capsule, so that Lion-O could age and be old enought to lead the Thundercats on Third Earth.
b. The suspension capsule malfunctioned, and caused some gas to leak out, not allowing Lion-O to slow down his aging.
As far as we can tell, these may be the only two logical explanations of the aging. Adding to this problem is the fact that there is a lot of confusion regarding Lion-O's age. The Toonami (Cartoon Network) bumpers give his age as 24, yet since he was 8-10 when Thundera exploded, and roughly 5 years were spent on Third Earth (plus the 10 in suspension), that would make Lion-O about 23.

1.4 The Mutants' vs. the Thundercats' arrival times on Third Earth [Exodus]
The Mutants are clearly shown attacking the Thundercats before the destruction of Third Earth (and, in fact, boarded the royal cruiser in an ill-fated attempt to steal the Sword of Omens). After the Thundercats enter suspension, Lion-O mysteriously ages (see section 1.3) and Jaga dies from old age, they land on Third Earth where the SAME mutants attack them, without any aging whatsoever. From this, it would seem that the Mutants can cover vast amounts of distance without suspension (for an idea of how far apart Thundera and Third Earth are, see section 2.1). This is highly unlikely. One suggestion might be that many of the mutants are cloned somewhat or share the same characteristics.

1.5 Hammerhand's Resurrection
Hammerhand and the other Berzerkers died at the end of the episode "The Terror of Hammerhand" and sunk to the bottom of the ocean.  This is strenghtened by the fact that Mumm-Ra summons Hammerhand's ghost to possess the Panthro clone's body in the later episode "Spitting Image".  However, somewhere between then and some later episodes, like the "Thundercats HO!" miniseries and "Together We Stand", the Berzerkers are present and definately alive, yet these episodes also definately take place after the ghost episode.  The only explanation I can think of is that they did not actually die, and what we witnessed in "Spitting Image" was astral projection of some sort, and not actual ghostliness.

1.6 Problems with Hachi-man
Hachi-man was originally introduced in The Thunder-Cutter as a Samurai that Mumm-Ra summoned from Third Earth's distant past.  In Hachi-man's Honor, according to Jaga, Hachi-man is sentback to his own time.  So how did Hachi-man return to the present to play his role in The Jade Dragon?

6 hours is ¹/1460th of a year.
So 2,000,000 LY trip in 6 hours is 2,000,000/(¹/1460) = 2,000,000 X 1460 = 2,920,000,000 or 2.920 X 10⁹ times the speed of light or about warp 233 in ST:NG terms.

That should be patently improbable, since the energy required to create enough power to provide that propulsion would be quite enormous. We have to work with the principle of conservation of energy, and we need energy to make energy. There is probably not enough energy in existence to create that amount of power. But again, this is all in theory.

Patrick Schulz writes:

Speaking on the Distance problem between Thundera/New Thundera and Third Earth, I must say that it is possible, but not probable.

A wormhole (The linking of the quantum singularities at the core of black holes) could explain the extremely short time range.  This need never be shown on the show, because if such a wormhole existed, and a ship traveling Warp 6 (In ST:TNG Terms) entered it, the wormhole would be torn appart by the subspacial shockwave of a ship at high warp passing through.  The ship would make it out the other side, but the passage behind them would rupture, destroying the link and creating a blast wave that would destroy the ship in question, if it did not immediately kick to Warp 9.5 to clear the estimated 2.5 light year range of the blast in time.

Another explanation is that the show is set so far forward in time that this section of the multiverse (Our crystal sphere of existence) has begun the collapse section of it's galactic oscillation.  This is also not really a good explanation, because if it closed that quickly in 5 years, so that a trip could take only a few hours or days (The trip could be as long as 4 days with the supplies they show.), the entropic nature of matter would have intensified, and universal breakdown might have started.  At Warp 7, a trip of four days would take them a short distance from the galactic border.  Now, in theory, they could be using another wormhole, but even then, it would seem that they would show that.

The ship could be using a quantum charge to generate a "Quantum slipstream" where travel is decidedly faster than warp flight. However, the stresses and unique look of the "slipstream" would be more than noticeable.

One final possibility is that they are at a point in space-time that the galaxies are now above each other.  Leaving the galactic plane, and taking a curved flight path could account for the time differences. The first path was straight, while the second path was a parabolic curve. (Like an ICBM flight path.) which hopped through the universal void. See ASCII Figure below.

                 )

                  )

                   )

                     )

                       )

                          )

                     Galaxy 1 (Milky Way)

[Oh, and as a note, warp travel (Travel faster than c) is possible through the warping of subspace.  There is a small theoretical area of physics, warp physics, which combines astrophysics and quantum mechanics.  However, since it is still all theory (We cannot at this time generate enough power for even Warp .5) there is little study of it.]

Hook Mountain is an isolated, hook-shaped snowmountain located on Third Earth. In the episode Secret of the Ice King, the top of the mountain was destroyed by an energy blast, setting off an avalanche. Given the scale of Snow-knight's castle to the rest of the mountain, the mountain logically could not have been more than 300 m in height. Nevertheless, when the avalanche formed, it spread outward from the mountain, crossing several different biomes (environmental areas), including a tropical forest, a savannah (where Cats' Lair is located), an agricultural field, and a desert. (figure 1) The snow seemed to travel a great distance, one of over 500 km.

3. Physical/Biological problems
3.1 Respiration in space (as well as the apparent presence of air pressure)
This problem has been a constant one with Thundercats, especially within the later episodes. For example, Hachi-man and Mandora are able to breathe in space. Not only are they able to breathe in space, but they are also able to venture into space without breathing apparatus or pressurized suits. Since space is a vacuum, and there is pressure from the blood and fluids of any creature, then anybody venturing into space should experience internal boiling, and the rupture of capillaries and small blood vessels. This is because of the lack of air pressure. Assigning the value of 1 atmosphere (6.8 kg/cm²) to a living organism, and the value of 0 atmospheres to space, the following relationship can be ascertained in the accompanying diagram. And, of course, an aerobic (air-breathing) creature cannot survive where there is no air, hence, a vacuum. Death in this case would be either by suffocation or the bends.

3.2 Lion-O being able to walk inside a volcano [All That Glitters]
This incident also showed that Thundercats hve a resistance to intense heat. By studying the flow of heat in a volcano, we can determine that as soon as Lion-O entered the side vent of the volcano, he would have been burned beyond recognition by the heat from the volcano, which is undoubtedly over 2500°C.
Lion-O walked into the central magma chamber, of all places, and actually climbed out through the top!! Since heat travels upwards, Lion-O should have been blasted with the most intense heat from the volcano, and consequently burned beyond recognition. Nevertheless, Lion-O was able to function quite well, and was able to move in the volcano's core.

3.3 The Luna-tacs being encased in lava for many years, and surviving.
This is very hard to believe, because if one is encased within lava, there will be no more oxygen. Besides that, the Luna-tacs would be incinerated completely from the intense heat. This one does not take much to dispute.

3.4 Pumyra's ability to drain a flood of lava, etc.
This is one of the more puzzling plotholes of the show. In Mummrana's Belt, Pumyra crossed a desert of lava geysers. When some erupted, filling the desert floor with lava, Pumyra climbed to safety onto a rock column (which did not melt, obviously). Pumyra then drained the lava back below the surface by hurling one of her explosive marbles at the ground. We shall now use a diagram to show how this should not be possible.
Referring back to section 3.2, we all know that heat travels upwards. Therefore, Pumyra should have also been incinerated when she first encountered the lava. And even if she wasn't above the lava, there is a field of intense heat surrounding hot lava, which would certainly be fatal.
From point P in the diagram, Pumyra hurled an explosive marble at the ground, which created a hole in which the lava drained back down. This is patently impossible, because the lava emerged from a hole in the ground, suggesting a magma chamber underneath!! Therefore, creating another hole would do nothing to stop the flow of lava, and would in fact increase the flow sometimes. Needless to say, it was quite awkward to see this. Basically, lava cannot be drained by a hole in the ground.

3.5 The Thundercats' lack of genitalia and nipples
This is the show's first ever plothole...the Thundercats appear nude in the first episode [Exodus]. And, they seem to be missing certain objects common to both humans and cats (from which Thundercats are descended)...external genitalia and nipples.
This aberration is shown in a few choice shots, including a nude Cheetara and Lion-O. Of course, all creatures have genitalia, so obviously they are hidden for reasons of modesty. (The entire reason is explained in the Weird Stories Flame Page.) Some have postulated that the genitalia are hidden inside a sheath, while the nipples are covered with thick fur. The nipple theory can hold water, but a sheath should be visible, which means that the artists drawing the characters were too modest to show the genitalia. Needless to say, the Thundercats were never really shown naked again.

3.6 Grune's Thundranium Immunity
It is established in Ghost Warrior that Thundercats (and in Thundercats Ho! and other episodes, all Thunderians) become weak when they handle Thundranium. Why then, does Grune, who was both a Thunderian and even a Thundercat while he was alive, forge a club out of Thundranium. He says that it is to weaken his Thundercat enemies, but since he's Thunderian, wouldn't it weaken him as well? One could argue that Grune might be immune to the
effects of Thundranium because he's a ghost. If this is the case, however, why is it that Jaga, who is a ghost as well, is weakened by Grune's Thundranium club while Grune himself is not?

3.7 Warrior Maidens
The series shows us in many episodes that the Warrior Maidens of the Tree Top Kingdom is a society comprised of women only. Nowhere does it ever show a man among them. In fact, there are only two human men that appear on Third Earth to my knowledge: Dr. Dometone and Safari Joe, neither of which meet the Warrior Maidens anyway. So how do the Warrior Maidens reproduce without men? It is possible that their society has men living with them but in a
very submissive role, perhaps to the point of being domestic slaves who are not allowed out of the house and are used basically only for reproductive purposes. It is also possible that the Warrior Maidens reproduce with males of other tribes of humans (not shown on the show) and send their male children to live with them, or kill them.

3.8 Chilla
A walking biology plothole: Two points we'd like to make about Chilla.

3.8a Her physiology
It is suggested in Exile Isle that she is made up of ice, since rock salt melts her. Furthermore, the fact that she can produce and spit ice from within her own body adds to that theory. If that is the case, however, how is it possible that a body that cold could withstand the temperate climate of Third Earth, well above freezing, (with an average temperature of about 20°C) without melting, not to mention the heat that must be generated from Skytomb's furnaces (in Mumm-Ra Lives she is shown in this room with no discomfort) or the heat that would be generated from exercise (in Wild Workout), or, in the most extreme case, the heat from the very lava she was sealed in for years?! (see section 3.3) Also, how could a body made up of ice also generate fire beams to melt the ice and fry inanimate objects? The heat that would have to be contained within the body would melt the very ice the body was made up of. Therefore, we are asserting that the scene in Exile Isle, where she was melted by rock salt, is completely wrong! Chilla cannot be made up of ice!
What is she made of then? Well, most likely she is a cold-blooded creature adapted to an extremely low temperature, and possesses some sort of moisture-manipulating physiology to create the ice spitting, and the heat-beams are generated by some other chemical reaction within her body.

3.8b How people survive being frozen by Chilla
We'd also like to point out that is impossible as well, at least if the victim is frozen for more than a few minutes. If any living being was coated by ice longer than that, then it would be dead. Encasement in ice, at least how it is shown on the show, clearly shows the victim's mouth and nose covered, therefore breathing would be impossible. The argument that the cold temperature induces suspended animation, allowing the bodily processes to slow so they can survive longer, can be brought up, but that is unlikely as well. First of all, the temperature that being frozen in ice (< 0°C) is at least 25°C below most warm blooded animals' body
temperatures. Therefore, anyone who did survive such a freezing would most likely have irreparable brain damage (from lack of oxygen) and severe frostbite. They would not be able to stand up and walk away!

According to Bruce Grubb, cryrogenists have shown that if a subject is frozen quickly enough large ice crystals that would have damamged or destroyed cells do not form.  The most popular substance for doing this is liquid nitrogen at 77 K (-196° C). The problem has always been in thawing out the subject: unless the subject is quickly and evenly thawed out the large ice crystals form and cause tissue damage.
Not only does Chilla have a problem thawing out her victims, but it is impossible for a living being to generate the intense cold needed for humanoid suspended animation.  Ironically well above the cryrogenic tempature range at -78° C is an alternative to water ice - frozen CO2, better known as dry ice. Unfortunately, Chilla's ice does not show the fog that always accompanies dry ice which seems to eliminate, though it is cold enough to bypass the problems that water ice has.

-Latter section from Bruce Grubb

3.10 Absence of spots on Jaguar Thunderians
The two Jaguar Thunderians we see (Jaga and Jaguara) have no evidence of spots on their bodies.  However, if the theory that thunderians are evolved cats with human essence (by this, I mean that, for some reason, Human genes intergrated with Cat genes) is true, then Thunderians evolved from the spotted jaguar should have spots at least somewhere on their bodys.  My guess is that a group of Jaguars seperated from the clan of pure Jaguars and mixed with Lion Thunderians, forming a new clan.  As of now, we have yet to see pure, spotted Jaguars.

4.1a The gyroscope
In place of a molten core of a planet brought together in pieces, and by definition tectonic, there is a gyroscope assembly. This gyroscope purportedly keeps the planet together and prevents it from breaking apart. This is completely illogical, as a gyroscope can only balance something contained *within* its assembly!! Plus, the gyroscope itself must be fixed to a flat surface in order to function as a stabilizing mechanism. Therefore, in hte case of the New Thundera gyroscope, the rings (or gimbals) would be the only thing that would balance. This is the same effect as if a gyroscope were placed inside a rubber sphere. No matter what you did to the gyroscope, the sphere would not balance. Therefore, there should not be a gyroscope contained within the planet's core.

4.1b The capture of Plundarr's moons
Plundarr, apparently, resides in the same planetary system as New Thundera, so when the planet reformed, the intense gravitational field from the Sword of Plundarr attracted the moons of Plundarr, bringing them into orbit around New Thundera. Either the gravitational pull is greater than that of a star, or Plundarr and New Thundera are extremely close to each other. Either way, the loss of moons (which control ocean tides and such) would probably be disastrous for a planet, as severe gravitational disruptions would result, undoubtedly causing cataclysms and the like.

4.1c The effects of those same moons on concentrated places
When Plundarr's moons migrated to New Thundera, they orbited (or hovered) in specific, concentrated places. Therefore, the moons each had their own effect on a specific part of the surface. This would suggest extreme closeness to the planet, and could eventually result in the moons colliding with the surface, and/or the destruction of the moons from the opposite forces of gravitational pull.

4.3 The Third Earth Ocean Plug
In the episode Dr. Dometone, it is told that a plug exists in the floor of the ocean to prevent the oceans from draining into the interior of the planet, and conceivably putting out the heat within the planet. Several problems arise with this assumption.
Even though oceans comprise 70% of Third Earth's (Earth) surface, in relation to the rest of the planet, they are a mere fraction of the entire planet's mass. Furthermore, the average temperature of 10°C or so for water compared with the average temperature of the molten core of the Earth (2500°C) would instantly vaporize any water coming into contact with the molten mantle. A sufficiently large hole could result in a large steam explosion. Therefore, the proportionately miniscule amount of water present on the earth's surface could not put out the heat within the core.
Secondly, the water would not drain into the hole, because density increases as you descend into the core of the earth, so the water would either remain in place, or would be violently evaporated.
Also, the heat present within the mantle and core of the Earth would melt any artificial plug put above it eventually, if one could be put in over a hole exposing the molten mantle of the Earth. The intense heat and pressure from the mantle would also make construction impossible.
Therefore, a plug in the floor of the ocean to prevent draining is patently impossible.

Conclusion
By outlining some of these plotholes, we have actually raised more questions!! But not only that, we have discovered that certain characters (i.e. Mumm-ra) are actually not as old as they are claimed to be, and that certain creatures in the show have an innate ability to breathe in airless vacuums.
However strange these plotholes may be, the Thundercats cartoon is still one of the most exciting and original concepts out there. And, by finding these plotholes, we can challenge ourselves to find new and better ways to write fanfics based on the show.

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Comments? Questions? E-mail Seth Triggs or Tracy Butler