as Jack Slater / Himself

as Leonard Diamond

as Dr. Franticek Svoboda

as Jesse James

as Walter Williams

as William Bonney ('Billy the Kid')

as The Virginian

as Secretary of Defense

as Claudia Baldwin

as Dee Dee

as Grant Willard

as Narrator / Blarney Kilakilarney (voice)

as Dora Hand

as John Bonniwell

as Izzy Einstein

as Sofia

as Catherine Curtis