Lionel Atwill as Maj. Gen. Sir John Sangye

Lucie Mannheim as Diana Cloam

Steven Geray as Martin Cloam

James Mason as Capt. Heverell

Leslie Perrins as Maj. Carson

Allan Jeayes as H.E., the Governor

Michael Lambart as Lorne

Kathleen Gibson as Belinda

Tom Gill as Daunt

Wally Patch as Crawford

Archibald Batty as Capt. Coates

Henry Hewitt as Defence counsel

Drusilla Wills as Miss Isabella Hobson Tuff

Cyril Howe as Julius Caesar (servant)

Evan Thomas as Chief Justice

Skelton Knaggs as Fazerack