Screenplay by DONALD JAMES   Directed by CYRIL FRANKEL     Strange noises in Craig’s head reveal the truth about a big bank robbery.     Plans for a vast bank robbery are discovered when Nemesis receives a tip-off that the money is to be placed in a Swiss bank. But where is it to be stolen from?   Inquiries led to Craig Stirling (STUART DAMON) interviewing banker Sir Frederick Howard (BASIL DIGNAM), who is curiously unhelpful and is later stabbed to death in a street.   Learning that Sir Frederick recently underwent an operation, Craig visits his doctor, Hallam (PETER WYNGARDE). He is amazed to find that Hallam was present when Sir Frederick was murdered.   Craig has good reason to be suspicious of the doctor because, with the aid of another doctor named Sumner (JAMES CULLIFORD), Hallam is planning to rob Sir Frederick’s bank and, in fact, the plan has already been set in operation. The two men overcome Craig with anaesthetic, and Hallam prepares him for a somewhat special operation...   Sharron (ALEXANDRA BASTEDO), in Geneva, senses that Craig is in danger. She and Richard (WILLIAM GAUNT) make their way to Hallam’s nursing home, but the doctor has left, taking Craig with him. But there is a clue that they have gone to Holland and there, in Rotterdam, Hallam and Sumner have bribed a port official, Van Velden (AUBREY MORRIS), to help with the importation of their “heavy machinery”. Van Velden is shot when he discovers that the “machinery” is gold, and demands a larger fee.   Meanwhile, Craig finds himself sitting by the roadside, recovering but wondering about strange noises in his head which are giving him orders. He telephone Tremayne (ANTHONY NICHOLLS), head of Nemesis, who tells him that Richard and Sharron are already searching the dock area in Rotterdam. Craig makes his way to the dock area, still worried about the vibrating noises in his head but fighting the pain. In trying to avoid detection by Hallam and Sumner, he dives into the water and, with his super-human powers, is able to stay under for so long that the men believe him to be dead.   When Craig surfaces, he finds Sharron and Richard waiting for him, and Sharron discovers that he has had a tiny transistor implanted in his ear when operated on by Hallam, who has thus been able to act as an invisible man giving Craig instructions. This, in itself, is a clue to the whole mystery of how Sir Frederick was forced into releasing the gold from his bank, and the final chase is now on...     AN PRODUCTION   Series created by Monty Berman and Dennis Spooner   © Copyright Incorporated Television Co. Ltd. MCMLXVII     Stuart Damon   Alexandra Bastedo   William Gaunt   Anthony Nicholls     Craig Stirling   Sharron Macready   Richard Barrett   Tremayne     Peter Wyngarde   James Culliford   Basil Dignam   Aubrey Morris   Steve Plytas     Hallam   Sumner   Sir Frederick   Van Velden   Boursin     Associate Producer   Director of photography   Art director   Editor     Johnny Goodman   Frank Watts   Charles Bishop   Peter Pitt     Musical director   Theme composed by   Post-production supervisor   Production manager   Casting     Albert Elms   Tony Hatch   Philip Aizlewood   Malcolm Chistopher   Judith Jourd     Sound editor   Sound recordists     Music editor   Associate art director   Set dresser   Construction manager     Bert Rule   Len Abbott, Dave Bowen   Deveril Goodman   John Graysmark   Brian Rider   Bill Greene     Second unit director   Second unit cameraman   Camera operator   Assistant director   Continuity   Special effects     John Hough   James Allen   John Winbolt   Ken Softley   Valery Norman   Sid Pearson     Scenic artist   Production buyer   Make-up supervisor   Hairdressing   Wardrobe supervisor   Supervising electrician     A.J. Van Montagu   Sid Palmer   Gerry Fletcher   Pat Grant   Laura Nightingale   Ted Hallows       Made on location and at ASSOCIATED BRITISH ELSTREE STUDIOS ENGLAND.