Detective Lt.Bill Bannister has the assignment to run down an unknown gang of terrorists spreading a net of crime over the city. Aiding him is Detective Tim Nolan, news photographer Vicki Logan and reporter Happy Haskins. Bill finds that the gang's leader is a mysterious Professor Mortis and the gang is made up of known criminals officially listed in the police records as dead. Each has become of member of Mortis' League of Murdered Men Cast Kent Taylor ... Det. Lt. Bill Bannister Irene Hervey ... Vicki Logan Ralph Morgan ... Dr. Clayton Maxton aka Prof. Mortis Robert Armstrong ... Det. Tim Nolan Richard Davies ... Happy Haskins Joseph Crehan ... Police Chief Martin O'Brien George Watts ... Mayor Hansen Ralf Harolde ... Halliger John Gallaudet ... Wilkinson William Haade ... Mike Taboni Victor Zimmerman ... Ted Lane aka Barnard George J. Lewis ... Joey Morrison aka Mason John Berkes ... Mr. Grub Pat O'Malley ... Police Chemist Crandall Robert Barron ... Police Direction Finder - Car 27 [Ch. 1] Kernan Cripps ... Police Direction Finder [Ch. 6] Grace Cunard ... Taboni's Landlady [Ch. 1] Eddie Dean ... Blair - Police Lab Technician [Ch. 1] William Desmond ... Rogan's Death Witness [Ch. 4] George Eldredge ... Policeman at Bank [Ch. 7] Edward Emerson ... Frenchy Ludoc [Chs. 5, 7-8] Eddie Fetherston ... Ground Radioman at Airport [Ch. 2] Eddie Foster ... Jerry Rogan [Chs. 3-4] Art Fowler ... Mechanic [Ch. 2] Jack Gardner ... Police HQ Radio Disptacher Alan Gregg ... Armored Car ...