While at the circus, the Wonder Twins and Gleek witness the revenge of circus animals as they zap the audience in a trance. The animals capture Gleek and zap the Wonder Twins as well, who they send off to lure Superman and Wonder Woman into a trap at the circus. The circus animals eventually turn the Super Friends into Super animals. Gleek frees Zan and Jayna from the trance, now it's up to the Wonder Twins and Gleek to free Superman and Wonder Woman and to end to this circus once and for all.
