Characters played by Boris Karloff
James Lee Wong
Characters played by Marjorie Reynolds
Bobbie Logan
Characters played by Grant Withers
Inspector Bill Street
Characters played by Huntley Gordon
Mr. Davidson
Characters played by George Lynn
Captain Guy Jackson
Characters played by William Royle
Captain Jaime
Characters played by James Flavin
Sergeant Jerry
Characters played by Lotus Long
Princess Lin Hwa
Characters played by Lee Tong Foo
Willie
Characters played by Bessie Loo
Lilly May
Characters played by Richard Loo
Tong Chief
Characters played by Ernie Stanton
Burton
Characters played by I. Stanford Jolley
Palisser Hotel Clerk
Characters played by Jack Kennedy
Sgt. Brady
Characters played by Donald Kerr
Taxi Driver
Characters played by Wilbur Mack
The Coroner
Characters played by Moy Ming
Aged Tong Member
Characters played by Bruce Mitchell
Police Officer at Explosion
Characters played by Angelo Rossitto
Mute Dwarf
Characters played by Guy Usher
Police Commissioner