Robert Urich as Jason

Mary Crosby as Princess Karina

Michael D. Roberts as Roscoe

Anjelica Huston as Maida

John Matuszak as Killjoy

Ron Perlman as Zeno

John Carradine as Supreme Commander

Natalie Core as Nanny

Jeremy West as Zorn

Bruce Vilanch as Wendon

Alan Caillou as Count Paisley

Marcia Lewis as Frog Lady

Daryl Keith Roach as Fitzcairn / Prisoner

Robert Symonds as Lanky Nibs

Gary Brockette as Percy the Robot

Rockne Tarkington as Patch

Ian Abercrombie as Hymie

Dolores Albin as Old Karina

Hank Worden as Elderly Jason

Bonnie Campbell-Britton as Dara

Carmen Filpi as Vendor

John Gillespie as Dogbite

Patty Maloney as Waitress

Shane McCamey as Templar Crewman

Ralph Meyering Jr. as Templar Crewman

Myron Natwick as Karina's Father

Raymond Skipp as Doper

Debra Troyer as Blonde Girl

Diana Webster as Seamstress

Richard Young as Debs

Sander Johnson as Political Prisoner

Steffen Zacharias as Prisoner

Lloyd Gordon as Dancer (uncredited)

Marian Green as Fighter at Pirates' Den (uncredited)

Jean Malahni as Fighter at Pirates' Den (uncredited)

Ira S. Rosenstein as The Monk (uncredited)

Ron Taylor as Pimp Robot (voice) (uncredited)