Superman (Kevin Caliber), previously guest starred as Superman/Kal-El in Supergirl prior to Tyler Hoechlin taking over the role.
The role of Private Donald Callahan was played by Superman street performer Charlee Soffer. He is often found outside Busch Stadium during Cardinals home games.
Not only Director, Donny Callahan dedicated his film to his grandfather (Private Don) but one of the Production Assistants and Donny's best friend, Adam Tedder is related to his Great, Great Uncle Field Marshal Arthur Tedder.