On the Double

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.

Cast

Danny Kaye

Pfc. Ernie Williams

Dana Wynter

Lady Margaret MacKenzie-Smith

Wilfrid Hyde-White

Colonel Somerset

Margaret Rutherford

Lady Vivian

Diana Dors

Sergeant Bridget Stanhope

Allan Cuthbertson

Captain Patterson

Jesse White

Corporal Joseph Praeger

Gregory Walcott

Colonel Rock Houston

Terence de Marney

Sergeant Colin Twickenham

Rex Evans

General Carleton Brown Wiffingham