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