Version 1
Oscar as Tom
Agent Otto as Jerry
Agent Owen as Spike
Oscar as Nibbles
Agent Olive as Jerry's Girlfriend
Agent Olympia as Robyn Starling
Agent Otis as Tyke
Oona as Tom's Girlfriend
Ms. O as Tom's owner
Odd Todd as Butch Cat
Shapeshifter as Aunt Figg
Version 2
Odd Todd as Tom
Oscar as Jerry
Coach O/Agent Otto as Spike