After escaping their destroyed city with the Sword of Omens, the team encounters the Fishmen, who sail the quicksand sea in search of a massive sea creature. The ThunderCats’ quest is to find the Book of Omens … but Lion-O is more interested in revenge on Mumm-Ra.

Cast: Will Friedle, Clancy Brown, Corey Burton, Emmanuelle Chriqui, Robin Atkin Downes, Madeleine Hall, Satomi Koorogi, Matthew Mercer, Eamon Pirruccello