May be the only Jewish actor to have played Adolf Hitler three times - in The Desert Fox, The Magic Face and The Twilight Zone.
When his older sister Stella Adler went to Hollywood and signed with
Metro-Goldwyn-Mayer, the studio changed her name to Stella Ardler.
Luther, whose acting career was primarily on the stage, asked her why
M.G.M. hadn't changed her name to Beverly Wilshire.