The Secret of the Manifique: Laxworthy and two friends secure the safety of the plans for the first torpedo to be used by the French navy.
Cast: Bernard Hepton (Mr J.T. Laxworthy), Neil McCarthy (Anderson), Christopher Neame (Sydney Wing), Mitzi Rogers (Madame Bertrand), John Nettleton (Admiral Christador), Joan Heath (Mrs Farrow), Peter Birrel (Monsieur Helder), Maggie Peacock (Marie), Gary Watson (Marquis Lefant), Bruce Boa (Freeling Poignton), Larry Cross (Foster), Michael Cadman (Naval Officer)
Writer: Gerald Kelsey / Story: E. Phillips Oppenheim / Producer: Reginald Collin / Director: Derek Bennett
Original Airdate: 19 Feb 1973 on ITV
Series: The Rivals Of Sherlock Holmes Season 2 Episode 4