Party Guest
Tommy Adams
Dave Ames
Dr. Curtis Temple
Tom Gregory
Brad Cameron
Cpl. Slim Green
Bill Kirby
'Doc' Vickers
Private Bronte
Rupert
Dr. John Lamont in 'Invisible Invaders'
Dr. Peter Kirk
Dr. John Robert Carrington
Dr. John Lamont
Internment Camp Guard (uncredited)
Dr. Eric Lutens
Lt. Morgan
Johnny Younger
Dr. Phil R. Merritt
John Crane, ages 20-28
Maddo
Himself (uncredited)
Herbert T. 'Herbie' Fletcher
Chuck
Warren James
Pfc. Dick Lawrence
Dick Lawrence
Charlie Johnson
Bob Grant
Lt. Steven F. Smith
Raphael, Duc of Castelbello
Commander
Joe Adams
Lt. Vermont
Tom
Frank Rocco
Donn Masters
Christopher Fortune
Lute Quigg
Bruce Benton (segment 2 "Terror Over Hollywood")
Sloane
Dr. Richard Warren
Rock Stewart
Calvin Adams
Ira Enright
Stratford E. Carver
Gil McRoberts
Mr. John Morrison
Neighbour
Self
Brett Sunley
Donald Bonyton Lewis
Perry Ford
Walt Simmons
Hannon
Jack Farnberg
Jack Forrest
Vance Ricker