On the Double (1961)

American GI Ernie Williams, admittedly weak-kneed, has an uncanny resemblance to British Colonel MacKenzie. Williams, also a master of imitation and disguise, is asked to impersonate the Colonel, ostensibly to allow the Colonel to make a secret trip East. What Williams is not told is that the Colonel has recently been a target of assassins. After the Colonel's plane goes down, the plan changes and Williams maintains the disguise to confuse the Nazis about D-Day.

Directed by: Melville Shavelson

Starring: Danny Kaye, Dana Wynter, Wilfrid Hyde-White, Margaret Rutherford, Diana Dors, Allan Cuthbertson

Links: Paramount Pictures, IMDb, Movie posters, Movie stills