WITH A RUTHLESS GANG TERRORIZING LONDON, SCOTLAND YARD CALLS BULLDOG DRUMMOND OUT OF RETIREMENT. WITH THE HELP OF ANOTHER DETECTIVE, THEY INFILTRATE THE GANG & BECOME TRUSTED MEMBERS UNTIL THEIR IDENTITIES ARE DISCOVERED. STARRING WALTER PIDGEON, MARGARET LEIGHTON, DAVID TOMLINSON, ROBERT BEATTY, BERNARD LEE.