Working with others such as Eleanor Bron, John Bird, and John Fortune, he broadened the scope of television comedy and pushed out the hitherto restricted boundaries of the BBC. His partnership with Dudley Moore, led to the popular and critically feted television show Not Only... But Also[?]. Using few props, and with musical interludes performed by Moore, they created a new style of dry absurdist televison which found a place in the mainstream.
The more risque humour of the Pete and Dud characters was taken to excess on long-playing records whereon the names "Derek and Clive" were used. Perhaps Cook's most enduring comic character is the static, dour, and monotone E. L. Wisty, created in this period.
Later, both Peter Cook and Dudley Moore acted in films, and Cook worked with Moore in such films as The Wrong Box (1966) and Bedazzled (1967) (with Eleanor Bron). Moore went on to Hollywood stardom in the 1970s and 1980s, which was a cause of some bitterness to Cook.
Peter Cook also started and became the proprietor of the satirical magazine, Private Eye, and financed the publication through a number of difficult periods, particularly when the magazine was punished financially in the wake of a number of high-profile libel trials.
Cook was an avid media follower, reading nearly all the British newspapers every day and following TV and radio programmes with vigour. He even gained a regular slot on a night-time London radio programme, where he would phone in using a pseudonym and entertain listeners with his complaints and musings.
Cook is an acknowledged influence on an apparently never-ending stream of comedians who have followed him from the amateur dramatic clubs of British universities to the Edinburgh festival and from thence to the radio and television studios of the BBC. Notable fans include the members of Monty Python's Flying Circus, and, more recently, the controversial satirist Chris Morris with whom Cook worked briefly in his final years.
Together with Spike Milligan, Cook broke so much new ground in the 1950 to 1965 period, that some feel that later comics had relatively little ground left to break. Some have seen Cook's life as tragic, insofar as the brilliance he exhibited in his youth did not lead to the recognition many thought he deserved.
His death in 1995 was as a result of internal haemhorraging caused by alcoholism.
UK chart singles:-