Them!

James Whitmore

Sgt. Ben Peterson

James Arness

FBI Agent Robert Graham

Joan Weldon

Dr. Pat Medford

Edmund Gwenn

Dr. Harold Medford

Onslow Stevens

Brig. Gen. Robert O'Brien

Sean McClory

Maj. Kibbee

Sandy Descher

The Ellinson Girl

Chris Drake

Trooper Ed Blackburn

Don Shelton

Trooper Capt. Fred Edwards

Fess Parker

Alan Crotty

Mary Alan Hokanson

Mrs. Lodge

Olin Howland

Jensen

William Schallert

Ambulance Attendant

Ann Doran

Child Psychiatrist

Dub Taylor

Railroad Yard Watchman

Leonard Nimoy

Army Sergeant