The XYY Man

The XYY Man is a 1976–77 British crime thriller television series created by Kenneth Royce, based on his novel series about reformed cat burglar William 'Spider' Scott, recruited by British intelligence for secret missions due to his unique genetic makeup (an extra Y chromosome), which supposedly predisposes him to crime. The plot follows his reluctant work for the secret service and his constant pursuit by the dogged Detective Sergeant George Bulman, leading to spin-offs like Strangers and Bulman.

Directed by Kenneth Royce, The XYY Man leans on a strong ensemble — Stephen Yardley, Don Henderson, Vivienne McKee — to carry a story that balances spectacle with character.

The series landed with audiences for its craft and performances, and remains one of the most talked-about crime titles of 1976.