The arrogant and aggressive Heavyweight Boxing Champion "One Punch" Mulligan, along with his manager and personal journalist, visit the jungle while on a safari. When Tarzan accidentally knocks "One Punch" out cold, the boxer demands a rematch. Tarzan refuses; however, "One Punch" is stubborn and looks for a way to provoke Tarzan into a fight.
- Michael T. Weiss as Tarzan
- Olivia d'Abo as Jane Porter
- Jeff Bennett as Archimedes Q. Porter
- Jim Cummings as Tantor
- April Winchell as Terk