Frank Canham

Lieutenant Commander John Byrne of the Naval Secret Service and his partner Pvt. Bill Riggers chase criminal Dr. Sin Fang, who is desperate to find a lost sacred seal. (The fifth and only surviving episode of a six-part serial about an evil mastermind inspired on Sax Rohmer's Dr. Fu Manchu.)

Detective Nayland Smith, comissioned by the British Government to investigate a series of murders comes up against the "Coughing Horror", Dr Fu-Manchu's servant.