Roy Thinnes Actor Jack Warden Barney Cahill Actor Laura Devon Susan Carver Actor Susan Oliver Stacy Actor Nancy Wickwire Evelyn Bowers Actor David Sheiner Mr. Burns Actor Norman Fell Neal Taft Actor Murray Matheson Dr. Reynard Actor Ed Begley Simon Carver Actor Barry Russo Lt. Alvarado Actor Victor Brandt Joey Taft Actor Clarke Gordon Mr. Nova Actor Byron Morrow Gilbert Actor Paul Pepper Dispatcher Actor Joel Fluellen Butler Actor Jacqueline Mayo Sobbing Woman Actor John Napier Alien #1 Actor Ron Stokes Alien at Controls Actor Ted Markland Male Alien Actor Max Kleven Third Alien Actor John Meredyth Lucas Director Joseph Sargent Director Don Brinkley Writer John W. Bloch Writer Theodore Sturgeon Writer Alan A. Armer Producer Quinn Martin Executive Producer Anthony Spinner Associate Producer