The severed cable swings Jeff back to a rooming house ledge. Returning to Science Associates, Jeff locates Vulcan's concelled microphone, through which he tricks Dirken into a secret rondevous. Burt and Glenda, misunderstanding Jeff's motives, intercede. Dirken is frced to take off with Glenda while Jeff subdues Burt. Vulcan's radio detects the direction finder Jeff planted in Dirken's plane and Dirken throws it overboard. Jeff gets rid of Burt and Pursues the plane in the rocket suit. Dirken parachutes to safety. Rocket Man gets into the diving plane and it crashes.
