A giant meteor is heading towards Third Earth. It couldn't have come at a better time, as the Thundercats' scanners at Cats Lair indicate it's made entirely of Thundrillium (it's probably a piece of Thundera itself!), and they're almost out. It lands on the frosty, snow-covered peak of Hook Mountain (shaped exactly like it sounds), the territory of the Snowmen. Despite the danger, Lion-O, eager to prove he's capable of the responsibilities of the lord of Thundercats, insists on going alone to find it and signaling the others to come bring the Thundertank once he does.
After fighting through an avalanche and a cyclone, Lion-O makes the slow, treacherous climb to the top of Hook Mountain, where he finds the Castle of the Snowmen. One of them comes out to meet him, mounted on a pure white big cat named Snowmeow. Lion-O assures him he comes in peace and explains that he's there to offer the alliance of his people and request the meteor that crashed nearby. The Snowman refuses both requests, stating he has no reason to trust strangers and that the meteor is the property of the Snowmen, but he gives Lion-O a chance to prove himself worthy of the Snowmen's friendship by dueling him.
Lion-O accepts but almost gets himself killed and, despite Snarf's and even Jaga's insistence, refuses to call the other Thundercats to bail him out. He derails the fight when, following a tip from Jaga, he takes control of the "snowcat" — it turns out the cats of Third Earth respect the authority of the Lord of the Thundercats. This accidentally leads to the Snowman falling down "the bottomless chasm." Lion-O, not wanting to kill him, goes after him by anchoring his claw line to the sword and lowering himself down.
The Mutants pick this perfect time to attack. Snowmeow successfully damages their flying machine and fends them off long enough for Lion-O and the Snowman to get out of the chasm, which is when Lion-O decides it is time to call for help. Fortunately, his friends (that is, Cheetara) decided they should follow after him hours ago and show up a few seconds after his signal hits the sky ("That was quick").
With the Thundertank to contend with, the Mutants are easily dispatched, but more importantly, the Snowman is now convinced that Lion-O is a warrior of honor and courage, worthy of his people's friendship. The Thundercats leave Hook Mountain with a fresh supply of Thundrillium and a new set of valuable allies.
This episode provides examples of:
- Ambiguous Syntax: While Lion-O's on his mission, Cheetara says, "I just know he's in trouble," followed by a joke later about "Woman's intuition." Did she mean in the common, traditional sense, or did her sixth sense actually tell her he needed help? For that matter, when Tygra asks her, "Why? What's on your mind, Cheetara?" and Panthro responds to her feeling by saying, "That's good enough for me," were they referring to her judgment or to her powers? Or just looking for an excuse to do more than just sit and wait in a powerless base?
- The Beastmaster: The lord of the Thundercats has the power to control big cats from Earth.
- Because You Were Nice to Me: The Snowman is willing to befriend the Thundercats after Lion-O saves his life.
- Bottomless Pit: The Bottomless Chasm
- The Cameo: The Living Ooze from "Mandora - The Evil Chaser" makes a brief appearance.
- Defeat Means Friendship: The Snowmen obviously believe in this, as their champion explains, "Friendship, honor, and alliance must be earned, youth, and in deadly combat!" At the end, Lion-O sates, "We have fought, and now we are friends."
- Don't Look Down: During the climb up the mountain, Snarf tells Lion-O, "Don't look down — I'll do it for both of us!" When they reach the "hook" part, which causes the climber's body to point a different way, he switches to, "Don't look up!"
- Exposed to the Elements: Zigzagged — Cheetara gives Lion-O a cloak for his trip, and he comments about how cold he is even with it, but he still seems much more comfortable than you'd expect in an outfit like his, and he ditches the cloak after the fight scene with no ill effects from the cold.
- Flaming Meteor
- Gamebook: One of two episodes to have a book in the Find Your Fate series based on it.
- Grim Up North: Most of the episode takes place in frozen, snow-covered mountains.
- Hair-Trigger Avalanche: Snarf causes one by crying out in fear.
- Horse of a Different Color: The champion uses a big cat as a mount.
- Human Snowball: Lion-O and Snarf gets stuck in one.
- Ice Palace: The Snowmen lives here, natch.
- Magic Meteor: This one contains the fuel you need to power your building and vehicle.
- No Name Given: The Snowman's name is never given. Lion-O addresses him as "Champion of the Snowmen."
- Non-Indicative Name: The "Snowmen" live in a snowy area, but they are not made out of snow.
- 1-Dimensional Thinking: A giant snowball comes rolling towards Lion-O and Snarf on a deserted, open mountainside. They make no attempt to run to their left or right to escape it.
- Remember the New Guy?: The first appearance of the fourth Mutant Vultureman, who's treated as if he's always been there.
- Security Cling: When the power goes out in Cats Lair, the Thunderkittens latch onto Lion-O.
- Ship Tease: This episode is the one time Lion-O's and Cheetara's Ship Tease isn't limited to one brief scene, between the bit where Cheetara gives him the cloak, her constant anxiety for him after he leaves, and the flirtatious wink she gives Lion-O after Panthro reveals she was the one who insisted they go after him.
- Snowball Fight: Snarf lobs snowballs at the Mutants' plane.
- This Is Something He's Got to Do Himself: Lion-O is adamant about this, even when Jaga suggests otherwise. Unusually, the events do not condemn his decision this time.
- You Must Be Cold: Gender Flipped — Cheetara gives Lion-O a cloak to protect him from the cold. Same implications as with traditional uses of the trope.
