Henry Brandon as Dr. Fu Man Chu

William Royle as Sir Dennis Nayland Smith

Robert Kellard as Allan Parker

Luana Walters as Mary Randolph

Olaf Hytten as Dr. Petrie

Tom Chatterton as Prof. Randolph

Gloria Franklin as Fah-Lo-Suee

John Merton as Loki

George Cleveland as Dr. James Parker

John Dilson as Prof. Ezra Howard

Dwight Frye as Prof. Anderson

Wheaton Chambers as Dr. Humphrey

George Pembroke as C.W. Crawford

Lal Chand Mehra as Sirdar Prahni

Guy D'Ennery as Ranah Sang

Lowden Adams as Blake, Randolph's Assistant

Philip Ahn as Dr. Chang

John Bagni as Dangra - Spy at Fort

Ann Baldwin as Miss Frisbie - Winchester's Secretary

Robert Blair as Police Sergeant at Randolph's

George Bruggeman as Fort Telegrapher

Budd Buster as Dacoit 2 on Train

Tommy Coats as Dacoit 13 in Asia

Victor Cox as Tartar

Joe De Stefani as High Lhama

Art Dillard as Dacoit 7 at Headquarters

Bert Dillard as Dacoit 16 in Fu Manchu's Hut

Akim Dobrynin as Solar Mirror Native

Frank Ellis as Tartar

James Fawcett as Dacoit

James Flatley as Pegai, Dacoit 4

Augie Gomez as Wax Museum Dacoit

Jennifer Gray as Stewardess

Duke Green as Clay Street Dacoit 6

Alan Gregg as Dacoit 5 Pilot

Jamiel Hasson as Tribal Chieftain

John Lester Johnson as Cardo, Howard's Servant

John Judd as Dacoit 17 in Fu Manchu's Hut

Edward Kaye as Dacoit 3 on Wires

Bert LeBaron as Railroad Fireman

James B. Leong as Chinese Si Fan Member

Eric Lonsdale as Sentry

Paul Marion as Si-Fan Messenger at Hotel

Merrill McCormick as Koomerow's Aide

Tofik Mickey as Hindu Si Fan Member

Jack Montgomery as Cleanshaven Villainous Native

Norman Nesbitt as Wally Winchester

Bill Nind as Lhama's Telegrapher

Tony Paton as Temple Guard

Charles Phillips as Railroad Mail Car Clerk

John Picorri as Prof. Krantz

Paul Renay as Nihala Tribe Chief Kandhar

Vinegar Roan as Dacoit 11 in Temple, Killed by Arrow

Jack Roper as Dacoit 10 Looking in Window

Hector V. Sarno as Scarred Native

Ernest Sarracino as Dowlah Rao - Arrested Dacoit 9

Carl Sepulveda as Mustachio'd Villainous Native

Lee Shumway as Police Lieutenant Corrigan at Wax Museum

Robert R. Stephenson as Tartar Si Fan Member

Walter Stiritz as Koomerow's Aide

Harry Strang as Police Lt. Wade at Winchester's Office

George Suzanne as Dacoit

Al Taylor as Dacoit 8 at Headquarters, Howard's and Lee's

Ken Terrell as Shanghai St. / Wax Museum Dacoit 18

Evan Thomas as Maj. Carlton

Kam Tong as Crawford's Manservant

Francis Walker as Koomerow, Lhama's Emissary

John Ward as British Consul Wilson

Frank Wayne as Dacoit 14 with Microphone

Ted Wells as Dacoit 15 Wearing Hat

Bill Wilkus as Dacoit 12 in Temple

Henry Wills as Tartar

Bob Woodward as Tribesman

Bill Yrigoyen as Hillsman with Knife

Joe Yrigoyen as Dacoit

Michael Vallon as Temple Guard