Them!

As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their existence, an FBI agent and, eventually, the US Army to eradicate the menace, before it spreads across the continent — and the world.

• 
  Gordon Douglas

• 
  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
• 
  Richard Deacon
  Bald Reporter at L.A. News Conference
• 
  Forbes Murray
  Government Official
• 
  Kenner G. Kemp
  Trooper #2
• 
  Charles Perry
  Soldier