The Hideous Sun Demon

Robert Clarke

— Dr. Gilbert McKenna

Patricia Manning

— Ann Russell

Nan Peterson

— Trudy Osborne

Patrick Whyte

— Dr. Frederick Buckell

Fred La Porta

— Dr. Jacob Hoffman

Peter Similuk

— George Messorio

William White

— Police Lt. Peterson (as Bill Hampton)

Robert Garry

— Dr. Stern

Donna King

— Suzy's Mother

Xandra Conkling

— Suzy

Del Courtney

— Radio Deejay

Ron Honthaner

— Policeman in Warehouse

Richard Cassarino

— Barfly / Man on Beach with Kids / Policeman (as Cass Richards)

Helen Joseph

Darryl Westbrook

Bill Currie

Pearl Driggs

— Convalescing Woman on Roof

Fran Leighton

Bob Hafner

John Murphy

Anthony J. Hilder

— (As Tony Hilder)

Chuck Newell

David Sloan

— Newsboy

Robin C. Kirkman

— Policeman (uncredited)

Douglas Menville

— Policeman (uncredited)