Richard Egan as Dan Street

Patricia Owens as Charlie

John Ericson as Dutch Holland

Michael Ansara as Count Mario Romano

Joan Blackman as Stassa

David Brian as Hogan

Johnny Seven as Spaniard

Khigh Dhiegh as King Chou Lai

Gregory Morton as Dr. Frazer

John Howard as Ernest Bushnell

Michael Dugan as Parkhouse

Eddie Firestone as Dr. Barnes

Olan Soule as Mace (as Olan Soulé)

Linda Kirk as Prissy

Virginia Wood as Receptionist

Robert Riordan as Congressman

King Moody as Patch