Three Cases of Murder

Orson Welles

— Lord Mountdrago ("Lord Mountdrago" segment)

John Gregson

— Edgar Curtain ("You Killed Elizabeth" segment)

Elizabeth Sellars

— Elizabeth ("You Killed Elizabeth" segment)

Emrys Jones

— George Wheeler ("You Killed Elizabeth" segment)

Alan Badel

— Owen (segment "Lord Mountdrago") / Mr. X (segment "In the Picture") / Harry (segment "You Killed Elizabeth")

André Morell

— Dr. Audlin ("Lord Mountdrago" segment)

Hugh Pryse

— Jarvis ("The Picture" segment)

Leueen MacGrath

— Woman in the House ("In the Picture" segment)

Eddie Byrne

— Snyder ("The Picture" segment)

Helen Cherry

— Lady Mountdrago ("Lord Mountdrago" segment)

Eamonn Andrews

— Introductions

Zena Marshall

— Beautiful Blonde (segment "Lord Mountdrago")

Patrick Macnee

— Guard Subaltern (segment "Lord Mountdrago") (uncredited)