Seasons & episodes
S1 · E49Trapped 1985-11-28 · 22 min
When a big storm hits Third Earth, the Thunderkittens are trapped in an old space capsule. Meanwhile, Tygra and Cheetra almost crash the Feliner, but Lion-O guides them in for a safe landing with the eye of Thundera. The kittens are captured by Mumm-ra, but end up saving the day by showing him his reflection in the window of the capsule.
S1 · E50Lion-O's Anointment Fourth Day: The Trial of Mind Power 1985-11-29 · 22 min
Lion-O undergoes the fourth task in his Anointment Trial.
S1 · E51Excalibur 1985-12-02 · 22 min
The story of Excalibur, the greatest sword in history, is revealed to Mumm-Ra, who is then determined to find the Excalibur and defeat Lion-O and the Sword of Omens.
S1 · E52Secret of the Ice King 1985-12-03 · 22 min
A giant Ice King is accidentally released from his glacial prison and attacks the Castle of the Snowmen.
S1 · E53Good and Ugly 1985-12-04 · 22 min
A Terator Starship, an extremely ugly spaceship, is pursued by a Kymera Craft, a visually appealing spaceship. The Terator Spaceship escapes and lands at the Cats' Lair
S1 · E54The Transfer 1985-12-05 · 22 min
A spaceship freighted with a lethal radioactive sphere is on a collision course for Third Earth.
S1 · E55Divide and Conquer 1985-12-06 · 22 min
Vultureman invents a voice imitator that imitates the ThunderCats' voices. He uses it to lure the ThunderCats into perilous situations.
S1 · E56Dream Master 1985-12-09 · 22 min
Mumm-Ra transforms into Mumm-Ra the Dream Master and summons spectral Dream Selves from the sleeping Panthro, Cheetara, Tygra, Wilykat, and Wilykit.
S1 · E57Out of Sight 1985-12-10 · 22 min
Willa is practicing her long-bow skills when a warning device alerts her to a Mutant attack. Willa is captured and the ThunderCats rush to rescue her.
S1 · E58The Mountain 1985-12-11 · 22 min
Mumm-Ra summons the Mutants and threatens to banish them from Third Earth unless they bring him the Sword of Omens.
S1 · E59The Superpower Potion 1985-12-12 · 22 min
Vultureman invents a Super Power Potion which give him magical powers, enabling him to mesmerize and defeat Tygra.
S1 · E60Eye of the Beholder 1985-12-13 · 22 min
Jackalman ambushes Snarf and attempts to steal the Sword of Omens. This gives Panthro the idea to make a duplicate sword as bait for the Mutants.
S1 · E61Lion-O's Anointment Final Day: The Trial of Evil 1985-12-16 · 22 min
The concluding trial in Lion-O's Anointment Trials pits him alone and weaponless against the evil Mumm-Ra.
S1 · E62The Trouble with ThunderKittens 1985-12-17 · 22 min
To prove themselves worthy of being ThunderCats, the ThunderKittens borrow the other ThunderCats' weapons and practice with them. They are ambushed by Mutants, who take their weapons.
S1 · E63Mumm-Rana 1985-12-18 · 22 min
The Feliner is attacked by the RatStar, manned by the Mutants. Jackalman, Monikan, and S-S-Slithe are ejected and saved by Mumm-Rana, a female mirror image of Mumm-Ra, who is a force for good.
S1 · E64The Shifter 1985-12-19 · 22 min
Vultureman invents the Shifter, a device that can switch personalities, and uses it on Panthro's personality and Snarf's body.
S1 · E65Fond Memories 1985-12-20 · 22 min
Mumm-Ra creates a museum where painting and statues come alive to oppose the ThunderCats.