"The Crystal Queen" is the twenty third episode of ThunderCats (original series).


Lion-O has to brave an ice palace to rescue an endangered bird from the clutches of a cruel and greedy queen.


While driving through the forest in the ThunderTank one night, Lion-O and Panthro see a glowing object streaking through the night sky. They try to keep pace with it but the tank stops abruptly. Upon inspection, Panthro finds that the Thundrillium module on the tank ran down, even though Snarf was supposed to recharge it. Panthro heads off to the Cats Lair to fetch a spare module, leaving Lion-O to guard the tank.

Panthro reaches Cats Lair shortly, where Snarf is serving dinner to the rest of the ThunderCats, and asks him about the spare module. Snarf can't find it at first but eventually remembers where he kept it. As Panthro is leaving, Snarf asks to join him but Panthro refuses, saying that there is no need as he will return with Lion-O very soon. However, Snarf gets a bad feeling that Lion-O is in danger and sneaks out after Panthro.

Meanwhile, Lion-O hears strange music coming from the nearby Berbil Village and heads off to investigate. Upon reaching the village, he sees the source of the music is a beautiful bird, who Ro-Bear-Bill tells him is the rare Arietta Bird. The birds singing ripens the Berbils' fruits and ensures that they will get a good harvest.

Suddenly, the streaking object that Lion-O had seen earlier returns and it turns out to be a rocket powered sleigh. Ro-Bear Bill explains to Lion-O that the occupant of the strange flying vehicle is Queen Tartara of the Crystal Kingdom and she is always trying to steal the Arietta Bird so that it may sing for her alone. As the vehicle makes a second pass, one of the drivers manages to nab the bird. Lion-O springs into action and grabs onto one of the runners of the sleigh as it flies off to the Crystal Kingdom.

When Panthro arrives back at the tank and does not see Lion-O, he goes to the Berbil Village where Ro-Bear Bill explains all that had happened. Panthro then gets in the tank and drives off towards the Crystal Kingdom but is unaware that Snarf had stowed away in the tank. Halfway up the mountain, Panthro comes to a fork in the road and as he gets out of the tank to investigate, he hears Snarf and discovers the stowaway. He then tells Snarf to wait there as he checks out the two paths. Snarf, however, notices Lion-O's footprints in the snow and races off following the trail.

Lion-O who had fallen from the flying sleigh near the Crystal Kingdom, sneaks into the palace by disguising himself as one of the guards. He makes his way into Queen Tartara's treasure room where the Arietta Bird is being held but before he can do anything, he is discovered by the queen who encases him in a giant crystal.

Snarf follows Lion-O's footprints all the way to the Crystal Kingdom and then burrows under its walls. He surfaces in the treasure room and uses the Arietta Bird's high pitched voice to break the crystal encasing Lion-O who immediately summons the ThunderCats. Panthro arrives in the ThunderTank, breaking through the wall of the palace. Lion-O and Snarf hop in the tank and the trio drive out destroying another wall. This causes the entire palace to start collapsing and the Arietta Bird escapes by flying out through a hole in the roof.


Ro-Bear Bill: "She never learned that the greatest pleasure comes from sharing".

Snarf: "Old Snarf just gets better with age."





  • The entire episode takes place at night.
  • The word "arietta" is Italian for a short aria, which is a piece of operatic music for a solo voice.
  • Queen Tartara, her palace and the outfit of her guards are loosely inspired from old Russian designs.
  • It is revealed in this episode that Snarf is tone deaf.
  • The floor in Queen Tartara's throne room is supposed to be made of wood even though the pattern indicates stone.

Animation Mistakes and/or Technical Glitches

  • Near the beginning, when Lion-O and Panthro are in the ThunderTank, Lion-O's belt is missing.
Crystal Queen error1.jpg
  • In the scene in which Ro-Bear Bill is telling Liion-O about Queen Tartara, the silver parts of his ears are missing.
Crystal Queen error2.jpg
  • When the yak is starting to charge at Lion-O, the hair on his forehead is erroneously painted the same color as his face instead of being brown like the rest of his coat.
Crystal Queen error3.jpg
  • Lion-O obtains only a coat and a hat from one of the guards but when he enters the Crystal Kingdom, he is wearing the guard's boots as well.
Crystal Queen error4.jpg

Inconsistencies/Continuity Errors and/or Goofs/Oddities


Lion-O: Did the engine break down?
Panthro: No way. When I build 'em, they don't dare break down!

Lion-O: He's getting a bit absent minded.
Panthro: Well, he's not getting any younger.
Lion-O: Snarf getting old. I never thought of that.

Lion-O: Jaga says there's always a benefit in misfortune. Hard to see what benefit that poor devil got out of this. But at least I won't freeze.

Queen Tartara: My treasure chamber is my pleasure alone! Even those who guard it are forbidden to look at it! Any who have seen it are doomed to remain here forever!


Crystal Kingdom, Cats Lair, Berbil Village


Episode Navigation

Previous episode:
"The Astral Prison"
ThunderCats Season Guide Next episode:
"Safari Joe"
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