Undercover

John Clements

Milos Petrovitch

Tom Walls

Kossan Petrovitch

Rachel Thomas

Maria Petrovitch

Stephen Murray

Dr. Stephan Petrovitch

Mary Morris

Anna Petrovitch

Godfrey Tearle

General von Staengel

Robert Harris

Col. Von Brock

Michael Wilding

Constantine

Charles Victor

Sergeant

Niall MacGinnis

Dr. Jordon

Ivor Barnard

Station Master

Ben Williams

Dragutin

George Merritt

A Yugoslav General

Stanley Baker

Petar

Tecwyn Jones

Danilo

Eynon Evans

Lieut. Banse

Norman Pierce

Lieut. Franke

Eric Micklewood

Lieut. Von Klotz

Finlay Currie

Priest (uncredited)

Gina Evans

Woman (uncredited)