John Loder

Reginald Parker / Edward Grey

June Duprez

April Manby Carson

Michael St. Angel

Lieutenant Bob Carson

Miles Mander

Chief Inspector W.R. Allison

Rose Hobart

Dorothy Kent

Gilbert Emery

Dr. Manby

Rex Evans

Leslie Shelton

Matthew Boulton

Inspector Graham

Olaf Hytten

Banks

Lydia Bilbrook

Mrs. Manby

Ian Wolfe

Lord Mayor Herman Brandon R. Clive

Frank Baker

Inspector (Uncredited)

Lillian Bronson

Hotel Maid (Uncredited)

Wheaton Chambers

Clerk (Uncredited)

Alec Craig

Vacuuming Bellboy (Uncredited)

Victor Cutler

Pilot (Uncredited)

Herbert Evans

Manby's Butler (Uncredited)

Joy Harington

London Waitress (Uncredited)

Colin Kenny

Inspector (Uncredited)

Frank Mayo

Policeman (Uncredited)

Tom McGuire

Barman (Uncredited)

Gavin Muir

Captain Perry (Uncredited)

Florence Wix

Mrs. Kent (Uncredited)