The Hideous Sun Demon

Robert Clarke

Dr. Gilbert McKenna

Nan Peterson

Trudy Osborne

Patricia Manning

Ann Russell

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)