Lion-O faces Mumm-Ra in a final showdown on Third Earth. As punishment for failing their task to eliminate the ThunderCats, the Ancient spirits of Evil exile Mumm-Ra to the edge of the universe. New Thundera is safely rebuilt. New dangers threaten the fledgling civilization, forcing these brave pioneers to push their powers to their limits.

Contains 31 episodes from season two. Special features: "ThunderCats ultimate adventure" challenge on disc 12.

Disc 7: Exile isle ; Key to Thundera ; Return of the ThunderCubs ; The formula ; Locket of lies ; Bracelet of power -- Disc 8: The wild workout ; The Thunderscope ; The jade dragon ; The circus train ; The last day -- Disc 9: Return to Thundera, part 1 ; Return to Thundera, part 2 ; Return to Thundera, part 3 ; Return to Thundera, part 4 ; Return to Thundera, part 5 -- Disc 10: Leah ; Frogman ; The heritage ; Screwloose ; Malcar ; Helpless laughter -- Disc 11: Cracker's revenge ; The Mossland monster ; Ma-Mutt's confusion ; The shadowmaster ; Swan song ; The touch of Armortus -- Disc 12: The Zaxx factor ; Well of doubt ; The book of omens.