Season
Season 4 Episode
- Season 1 Exodus
- Season 1 The Unholy Alliance
- Season 1 Berbils
- Season 1 The Slaves of Castle Plun-Darr
- Season 1 Pumm-Ra
- Season 1 The Terror of Hammerhand
- Season 1 Trouble with Time
- Season 1 The Tower of Traps
- Season 1 The Garden of Delights
- Season 1 Mandora: the Evil Chaser
- Season 1 The Ghost Warrior
- Season 1 The Doomgaze
- Season 1 Lord of the Snows
- Season 1 The Spaceship Beneath the Sands
- Season 1 The Time Capsule
- Season 1 The Fireballs of Plun-Darr
- Season 1 All That Glitters
- Season 1 Spitting Image
- Season 1 Mongor
- Season 1 Return to Thundera
- Season 1 Dr. Dometone
- Season 1 The Astral Prison
- Season 1 The Crystal Queen
- Season 1 Safari Joe
- Season 1 Snarf Takes Up the Challenge
- Season 1 Sixth Sense
- Season 1 The Thunder-Cutter
- Season 1 The Wolfrat
- Season 1 Feliner (1)
- Season 1 Feliner (2)
- Season 1 Mandora and the Pirates
- Season 1 Return of the Driller
- Season 1 Dimension Doom
- Season 1 Queen of 8 Legs
- Season 1 Sword in a Hole
- Season 1 The Evil Harp of Charr-Nin
- Season 1 Lion-O's Anointment First Day: Trial of Strength
- Season 1 The Demolisher
- Season 1 Monkian's Bargain
- Season 1 Tight Squeeze
- Season 1 The Micrits
- Season 1 Lion-O's Anointment Second Day: The Trial of Speed
- Season 1 The Rock Giant
- Season 1 Jackalman's Rebellion
- Season 1 Turmagar the Tuska
- Season 1 Lion-O's Anointment Third Day: Trial of Cunning
- Season 1 The Mumm-Ra Berbil
- Season 1 Mechanical Plague
- Season 1 Trapped
- Season 1 Lion-O's Anointment Fourth Day: The Trial of Mind Power
- Season 1 Excalibur
- Season 1 Secret of the Ice King
- Season 1 Good and Ugly
- Season 1 The Transfer
- Season 1 Divide and Conquer
- Season 1 Dream Master
- Season 1 Out of Sight
- Season 1 The Mountain
- Season 1 The Superpower Potion
- Season 1 Eye of the Beholder
- Season 1 Lion-O's Anointment Final Day: The Trial of Evil
- Season 1 The Trouble with ThunderKittens
- Season 1 Mumm-Rana
- Season 1 The Shifter
- Season 1 Fond Memories
ThunderCats - Season 1 Episode 19 Mongor
8.25 22 minutes Wilykit and Kat accidentally free an ancient monster that was banished to an old shrine centuries ago. The evil monster, Mongor, begins to destroy the planet, and is much stronger than the Thundercats. He captures all the elder Thundercats with his powers. Wilykit and Kat return to the shrine to find a way to destroy him. They report back to Lion-O and tell him that in order to destroy Mongor, he has to fight the monster without looking at it. Lion-O defeats the monster and all is returned to normal.
