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.
The XYY Man (Season 2)
Friends and Enemies (Episode 1)
Writer: Tim Aspinall
Air date: 1977-06-27
Runtime: 60 min
Overview: Spider has bought a half share in a small executive aircraft which he flies with his partner. One of his first customers is an acquaintance from his days of crime. He thinks nothing of it until his best friend is found dead in the Thames.
The Missing Civil Servant (Episode 2)
Writer: Tim Aspinall
Air date: 1977-07-04
Runtime: 60 min
Overview: Has Riesen become involved with American crime and, if he really has, what impact will this have on Spider?
The Big Bang (Episode 3)
Writer: Tim Aspinall
Air date: 1977-07-11
Runtime: 60 min
Overview: Spider is forced to fly up North en route to Russia with a bomb onboard. This turns out to be the decoy at the airport for a half a million pound robbery.
At the Bottom of the River (Episode 4)
Writer: Tim Aspinall
Air date: 1977-07-18
Runtime: 60 min
Overview: Narrowly escaping the aeroplane explosion, Spider returns home to find Reisen's body being loaded into a van. Then Bulman turns up to save him from being drowned.
When We Were Very Greedy (Episode 5)
Writer: Murray Smith
Air date: 1977-07-25
Runtime: 60 min
Overview: Spider is invited to sit on a prison enquiry board headed by a rich merchant banker. Bulman and Willis continue dogging his tracks, with Bulman becoming ever more distracted by the need to nick Spider.
Now We Are Dead (Episode 6)
Writer: Murray Smith
Air date: 1977-08-01
Runtime: 60 min
Overview: Caught up in a situation beyond his control, Spider finds that Quilter has been murdered and Bucket-Face Smith has vanished. Then he finds something nasty in the study.
Whisper Who Dares (Episode 7)
Writer: Murray Smith
Air date: 1977-08-08
Runtime: 60 min
Overview: A trail of corpses seems to follow Spider as he attempts to free himself from the situation he's been caught up in.
Law and Order (Episode 8)
Writer: Edward Boyd
Air date: 1977-07-15
Runtime: 60 min
Overview: Imprisoned, Spider is involved in a conspiracy to spring himself and Norden. They succeed in breaking out of jail and Norden disappears, leaving behind a dead warden.
The Detrimental Robot (Episode 9)
Writer: Edward Boyd
Air date: 1977-08-22
Runtime: 60 min
Overview: Bulman is hot on the trail of Spider, who finds himself in a hostage situation. The body count rises as two detectives are killed.
A View to a Death (Episode 10)
Writer: Edward Boyd
Air date: 1977-08-29
Runtime: 60 min
Overview: Maggie bonds Spider out but, when he is released, he's sought once more to risk his life in order to capture a foreign agent.

Seasons
Episodes 3
Episodes 10