The Adventure of the Torture Cage

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.)

• Fred PaulDirector
• Patrick K. HealeScreenplay

• H. Agar LyonsDr. Sin Fang
• Fred PaulLt. Comdr. John Byrne R. N. of the N. S. S.
• Wally PatchPrivate Bill Riggers
• Fred RainsProfessor Harbray
• Evelyn ArdenBetty Harbray