The inhabitants of the planet Thundera evacuate just before it is destroyed. They were pursued by a band of mutants. All but one of their escape ships was destroyed. Only a small group of Thunderians (Thundercats) remained. With only half engine power, the group, which was led by Jaga, had to set a course for the nearest planet. Jaga commanded their ship while the other seven were in their stasis tubes. Jaga died on their journey to Third Earth and their ship crashed there. Soon they made friends with various groups in the area and they designed a fortress. Mumm-Ra the centuries-old embodiment of evil, along with the mutants that destroyed the rest of the Thunderians are a constant threat. But Lion-O, the new leader of the Thundercats, with his weapon the "Sword of Omens" will help the Thundercats to have a standing chance.
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The peak run. Top 40% of seasons by average rating — consecutive, with an average of 6.39.
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Larry Kenney
Lion-O / Jackalman (voice)
Peter Newman
Tygra / WilyKat / Monkian (voice)
Earle Hyman
Panthro (voice)
Lynne Lipton
Cheetara / WilyKit (voice)
Earl Hammond
Mumm-Ra / Jaga / Vultureman (voice)
Bob McFadden
Snarf / Slithe (voice)
Gerrianne Raphael
Pumyra (voice)
Doug Preis
Alluro (voice)
All 130 episodes plotted by IMDb rating
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65 episodes • 1985Avg: 6.5Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Exodus | Jan 23, 1985 | 8.1 |
| 2 | The Unholy Alliance | Jan 23, 1985 | 8.4 |
| 3 | Berbils | Sep 11, 1985 | 7.4 |
| 4 | The Slaves of Castle Plun-Darr | Sep 12, 1985 | 7.4 |
| 5 | Pumm-Ra | Sep 13, 1985 | 8.0 |
| 6 | The Terror of Hammerhand | Sep 16, 1985 | 7.3 |
| 7 | Trouble with Time | Sep 17, 1985 | 8.0 |
| 8 | The Tower of Traps | Sep 18, 1985 | 8.0 |
| 9 | The Garden of Delights | Sep 19, 1985 | 8.0 |
| 10 | Mandora: the Evil Chaser | Sep 20, 1985 | 7.2 |
| 11 | The Ghost Warrior | Sep 23, 1985 | 7.3 |
| 12 | The Doomgaze | Sep 24, 1985 | 7.5 |
| 13 | Lord of the Snows | Sep 25, 1985 | 6.7 |
| 14 | The Spaceship Beneath the Sands | Sep 26, 1985 | 7.0 |
| 15 | The Time Capsule | Sep 27, 1985 | 6.4 |
| 16 | The Fireballs of Plun-Darr | Sep 30, 1985 | 8.0 |
| 17 | All That Glitters | Oct 1, 1985 | 8.0 |
| 18 | Spitting Image | Oct 2, 1985 | 6.0 |
| 19 | Mongor | Oct 3, 1985 | 6.0 |
| 20 | Return to Thundera | Oct 4, 1985 | 6.0 |
| 21 | Dr. Dometone | Oct 7, 1985 | 6.0 |
| 22 | The Astral Prison | Oct 8, 1985 | 6.0 |
| 23 | The Crystal Queen | Oct 9, 1985 | 6.0 |
| 24 | Safari Joe | Oct 10, 1985 | 8.0 |
| 25 | Snarf Takes Up the Challenge | Oct 11, 1985 | 6.0 |
| 26 | Sixth Sense | Oct 28, 1985 | 6.0 |
| 27 | The Thunder-Cutter | Oct 29, 1985 | 6.0 |
| 28 | The Wolfrat | Oct 30, 1985 | 6.7 |
| 29 | Feliner (1) | Oct 31, 1985 | 6.0 |
| 30 | Feliner (2) | Nov 1, 1985 | 6.0 |
| 31 | Mandora and the Pirates | Nov 4, 1985 | 6.0 |
| 32 | Return of the Driller | Nov 5, 1985 | 6.0 |
| 33 | Dimension Doom | Nov 6, 1985 | 6.0 |
| 34 | Queen of 8 Legs | Nov 7, 1985 | 6.0 |
| 35 | Sword in a Hole | Nov 8, 1985 | 6.0 |
| 36 | The Evil Harp of Charr-Nin | Nov 11, 1985 | 6.0 |
| 37 | Lion-O's Anointment First Day: Trial of Strength | Nov 12, 1985 | 6.0 |
| 38 | The Demolisher | Nov 13, 1985 | 6.0 |
| 39 | Monkian's Bargain | Nov 14, 1985 | 6.0 |
| 40 | Tight Squeeze | Nov 15, 1985 | 6.0 |
| 41 | The Micrits | Nov 18, 1985 | 6.0 |
| 42 | Lion-O's Anointment Second Day: The Trial of Speed | Nov 19, 1985 | 6.0 |
| 43 | The Rock Giant | Nov 20, 1985 | 6.0 |
| 44 | Jackalman's Rebellion | Nov 21, 1985 | 6.0 |
| 45 | Turmagar the Tuska | Nov 22, 1985 | 6.0 |
| 46 | Lion-O's Anointment Third Day: Trial of Cunning | Nov 25, 1985 | 6.0 |
| 47 | The Mumm-Ra Berbil | Nov 26, 1985 | 6.0 |
| 48 | Mechanical Plague | Nov 27, 1985 | 6.0 |
| 49 | Trapped | Nov 28, 1985 | 6.0 |
| 50 | Lion-O's Anointment Fourth Day: The Trial of Mind Power | Nov 29, 1985 | 6.0 |
| 51 | Excalibur | Dec 2, 1985 | 6.0 |
| 52 | Secret of the Ice King | Dec 3, 1985 | 6.0 |
| 53 | Good and Ugly | Dec 4, 1985 | 6.0 |
| 54 | The Transfer | Dec 5, 1985 | 6.0 |
| 55 | Divide and Conquer | Dec 6, 1985 | 6.0 |
| 56 | Dream Master | Dec 9, 1985 | 6.0 |
| 57 | Out of Sight | Dec 10, 1985 | 6.0 |
| 58 | The Mountain | Dec 11, 1985 | 6.0 |
| 59 | The Superpower Potion | Dec 12, 1985 | 8.0 |
| 60 | Eye of the Beholder | Dec 13, 1985 | 8.0 |
| 61 | Lion-O's Anointment Final Day: The Trial of Evil | Dec 16, 1985 | 6.0 |
| 62 | The Trouble with ThunderKittens | Dec 17, 1985 | 6.0 |
| 63 | Mumm-Rana | Dec 18, 1985 | 6.0 |
| 64 | The Shifter | Dec 19, 1985 | 6.0 |
| 65 | Fond Memories | Dec 20, 1985 | 8.0 |
25 episodes • 1986Avg: 6.2Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | ThunderCats Ho! (1) | Sep 8, 1986 | 8.0 |
| 2 | ThunderCats Ho! (2) | Sep 9, 1986 | 8.0 |
| 3 | ThunderCats Ho! (3) | Sep 10, 1986 | 8.0 |
| 4 | ThunderCats Ho! (4) | Sep 11, 1986 | 6.0 |
| 5 | ThunderCats Ho! (5) | Sep 12, 1986 | 6.0 |
| 6 | Mumm-Ra Lives (1) | Sep 7, 1987 | 6.0 |
| 7 | Mumm-Ra Lives (2) | Sep 8, 1987 | 6.0 |
| 8 | Mumm-Ra Lives (3) | Sep 9, 1987 | 6.0 |
| 9 | Mumm-Ra Lives (4) | Sep 10, 1987 | 6.0 |
| 10 | Mumm-Ra Lives (5) | Sep 11, 1987 | 6.0 |
| 11 | Catfight | Sep 14, 1987 | 6.0 |
| 12 | Psych Out | Sep 15, 1987 | 6.0 |
| 13 | The Mask of Gorgon | Sep 16, 1987 | 6.0 |
| 14 | The Mad Bubbler | Sep 17, 1987 | 6.0 |
| 15 | Together We Stand | Sep 18, 1987 | 6.0 |
| 16 | Ravage Island | Sep 21, 1987 | 6.0 |
| 17 | Time Switch | Sep 22, 1987 | 6.0 |
| 18 | The Sound Stones | Sep 23, 1987 | 6.0 |
| 19 | Day of the Eclipse | Sep 24, 1987 | 6.0 |
| 20 | Sideswipe | Sep 25, 1987 | 6.0 |
| 21 | Mumm-Rana's Belt | Sep 28, 1987 | 6.0 |
| 22 | Hachiman's Honor | Sep 29, 1987 | 6.0 |
| 23 | Runaways | Sep 30, 1987 | 6.0 |
| 24 | Hair of the Dog | Oct 1, 1987 | 6.0 |
| 25 | Vultureman's Revenge | Oct 2, 1987 | 6.0 |
20 episodes • 1988Avg: 6.0
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | ThunderCubs (1) | Sep 5, 1988 | 6.0 |
| 2 | ThunderCubs (2) | Sep 6, 1988 | 6.0 |
| 3 | ThunderCubs (3) | Sep 7, 1988 | 6.0 |
| 4 | ThunderCubs (4) | Sep 8, 1988 | 6.0 |
| 5 | ThunderCubs (5) | Sep 9, 1988 | 6.0 |
| 6 | Totem of Dera | Sep 12, 1988 | 6.0 |
| 7 | The Chain of Loyalty | Sep 13, 1988 | 6.0 |
| 8 | Crystal Canyon | Sep 14, 1988 | 6.0 |
| 9 | The Telepathy Beam | Sep 15, 1988 | 6.0 |
| 10 | Exile Isle | Sep 16, 1988 | 6.0 |
| 11 | Key to Thundera | Sep 19, 1988 | 6.0 |
| 12 | Return of the ThunderCubs | Sep 20, 1988 | 6.0 |
| 13 | The Formula | Sep 21, 1988 | 6.0 |
| 14 | Locket of Lies | Sep 22, 1988 | 6.0 |
| 15 | Bracelet of Power | Sep 23, 1988 | 6.0 |
| 16 | The Wild Workout | Sep 26, 1988 | 6.0 |
| 17 | The Thunderscope | Sep 27, 1988 | 6.0 |
| 18 | The Jade Dragon | Sep 28, 1988 | 6.0 |
| 19 | The Circus Train | Sep 29, 1988 | 6.0 |
| 20 | The Last Day | Sep 30, 1988 | 6.0 |
20 episodes • 1989Avg: 6.0
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Return to Thundera (1) | Sep 4, 1989 | 6.0 |
| 2 | Return to Thundera (2) | Sep 5, 1989 | 6.0 |
| 3 | Return to Thundera (3) | Sep 6, 1989 | 6.0 |
| 4 | Return to Thundera (4) | Sep 7, 1989 | 6.0 |
| 5 | Return to Thundera (5) | Sep 8, 1989 | 6.0 |
| 6 | Leah | Sep 11, 1989 | 6.0 |
| 7 | Frogman | Sep 12, 1989 | 6.0 |
| 8 | The Heritage | Sep 13, 1989 | 6.0 |
| 9 | Screwloose | Sep 14, 1989 | 6.0 |
| 10 | Malcar | Sep 15, 1989 | 6.0 |
| 11 | Helpless Laughter | Sep 18, 1989 | 6.0 |
| 12 | Cracker's Revenge | Sep 19, 1989 | 6.0 |
| 13 | The Mossland Monster | Sep 20, 1989 | 6.0 |
| 14 | Ma-Mutt's Confusion | Sep 21, 1989 | 6.0 |
| 15 | Shadowmaster | Sep 22, 1989 | 6.0 |
| 16 | Swan Song | Sep 25, 1989 | 6.0 |
| 17 | Touch of Amortus | Sep 26, 1989 | 6.0 |
| 18 | The Zaxx Factor | Sep 27, 1989 | 6.0 |
| 19 | Well of Doubt | Sep 28, 1989 | 6.0 |
| 20 | The Book of Omens | Sep 29, 1989 | 6.0 |
