Henry Hull as Dr. Wilfred Glendon

Warner Oland as Dr. Yogami

Valerie Hobson as Lisa Glendon

Lester Matthews as Paul Ames

Lawrence Grant as Sir Thomas Forsythe

Spring Byington as Ettie Coombes

Clark Williams as Hugh Renwick

J.M. Kerrigan as Hawkins

Charlotte Granville as Lady Forsythe

Ethel Griffies as Mrs. Whack

Zeffie Tilbury as Mrs. Moncaster

Jeanne Bartlett as Daisy

Reginald Barlow as Timothy the Falden Caretaker (uncredited)

Egon Brecher as Priest (uncredited)

Herbert Evans as Detective Evans (uncredited)

Connie Leon as Yogami's Housekeeper Millie (uncredited)

Amber Norman as Girl in Goose Lane (uncredited)

Tempe Pigott as Drunk Woman (uncredited)

Harry Stubbs as Officer Jenkins (uncredited)

Eole Galli as The Prima Donna

Wong Chung as

J. Gunnis Davis as

Dick Gordon as Party Guest (uncredited)

Helena Grant as

Boyd Irwin as

Noel Kennedy as

George Kirby as

Maude Leslie as

James May as

William Millman as

Edmund Mortimer as

Joseph North as

David Thursby as

Louis Vincenot as

Beal Wong as