Kronos

Jeff Morrow

Dr. Leslie Gaskell

Barbara Lawrence

Vera Hunter

George O'Hanlon

Dr. Arnold Culver

John Emery

Dr. Hubbell Eliot

Morris Ankrum

Dr. Albert Stern

Kenneth Alton

McCrary - The Pickup Driver

Jose Gonzales-Gonzales

Manuel Ramirez

Robert Forrest

KGTK-TV Newscaster

Baxter Ward

Second Newscaster

John Halloran

Lab Central Security Guard

Marjorie Stapp

Nurse

John Parrish

Gen. Perry

Don Eitner

Air Force Meteorology Sergeant

Ron Kennedy

Air Force Control Tower Sergeant

Gordon Mills

Sergeant

Rosa Turich

Manuel's Wife

Robert Shayne

Air Force General

Richard Harrison

Pilot