Dr. Paul Kettering

Ed Nelson

Acting

Alice Summers

Joanna Lee

Writing

Senator Walter K. Powers

Cornelius Keefe

Acting

Glenn Cameron

Alan Jay Factor

Acting

Elaine Cameron

Jody Fair

Acting

Dr. Wyler

David Hughes

Acting

Dan Walker

Robert Ball

Acting

Sheriff

Phil Posner

Acting

Mayor Cameron

Orville Sherman

Acting

Telegrapher

Henry Randolph

Acting

Zombie (uncredited)

Hampton Fancher

Acting

Professor Cole

Leonard Nimoy

Acting

Doctor

Doug Banks

Acting

Prof. Helsingman

Saul Bronson

Acting