Constance Bennett

~ as ~

Frances Hawtree / Z-1

Erich von Stroheim

~ as ~

Valdar / Schiller / Blecher

Anthony Bushell

~ as ~

Capt. Arthur Chamberlain

William Courtenay

~ as ~

Mr. Yates

Crauford Kent

~ as ~

General Hewlett

Charlotte Walker

~ as ~

Lady Catherine Chamberlain

William Holden

~ as ~

Sir Winston Chamberlain

Paul Panzer

~ as ~

'Kirsch' the Decoy (uncredited)

Wilhelm von Brincken

~ as ~

Capt. Kugler (uncredited)

Ullrich Haupt

~ as ~

German Colonel (uncredited)