Woodhouse began writing for TV series, starting with the children's show 'Supercar (1961-1962)', and eventually became the lead writer for The Avengers for four years.
Woodhouse attending medical school at St Mary's hospital, Paddington. He studied experimental psychology under Richard Gregory and did postgraduate research for a year as a research scholar with the Medical Research Council Applied Psychology Unit at Cambridge, where he designed and built the Logical Truth Computer (LTC, nicknamed Lettuce) to investigate and compare the differences between human and machine intelligence.
He served in the English Royal Air Force. His older half-brother, Robert, a Mosquito pilot with the RAF's 107 Squadron, was killed over Arnhem in 1944.
Woodhouse was the son of a doctor, Robert Woodhouse, and his wife, Josephine Fielding Woodhouse, who wrote verse as Anthony Woodhouse and won the Newdigate prize for English verse while she was at Oxford.
In his youth he earned spending money during college by writing science fiction stories for American pulp magazines under various pseudonyms.
Amongst his many and varied interests developed a computer program called 'Illumination' in the 1980s which was capable of storing a complete novel with graphics on a 3.5 floppy disc. So by the 1990s had a catalogue of (what would be called today) 'E.Books' of his own stories.