Ed Nelson

Dr. Paul Kettering

Joanna Lee

Alice Summers

Cornelius Keefe

Senator Walter K. Powers

Alan Jay Factor

Glenn Cameron

Jody Fair

Elaine Cameron

David Hughes

Dr. Wyler

Robert Ball

Dan Walker

Phil Posner

Sheriff

Orville Sherman

Mayor Cameron

Henry Randolph

Telegrapher

Hampton Fancher

Zombie (uncredited)

Leonard Nimoy

Professor Cole

Doug Banks

Doctor

Saul Bronson

Prof. Helsingman