by Elwyn Jones.
[Starring] Stratford Johns as Det. Chief Supt. Barlow, Frank Windsor as Det.-Insp. Watt, Norman Bowler as Det.-Sgt. Hawkins, Dan Meaden as Det.-Con. Box, Gilbert Wynne as Det.-Con. Dwyer and Robert Keegan as Mr. Blackitt
with John Welsh as A.C.C. Calderwood, Co-ordinator
(Part 3: next Wednesday)