Wooster and Wimsey, 1962–1979
Tastes in film changed in the late 1950s and early 1960s, with the new wave of British films moving away from plots centred on the upper classes and the establishment, to works such as Look Back in Anger, Room at the Top (both 1959), Saturday Night and Sunday Morning (1960) and The Loneliness of the Long Distance Runner (1962), where working class drama came to the fore. One of the effects of the new movement was a downturn in the number of films that wanted a character like those normally played by Carmichael. He was still being offered some film roles, but all, he said, "were variations on the same old bumbling, accident-prone clot" with which he was becoming increasingly bored.
In August 1964 the BBC approached Carmichael to discuss the possibility of his taking the role of Bertie Wooster—described by Fairclough as "the misadventuring, 1920s upper-class loafer"—for adaptations of the works of P. G. Wodehouse. He turned it down, as he had agreed to appear on Broadway, taking the lead in a production of the farce Boeing-Boeing. He appeared at the Cort Theatre in February 1965, but the run ended after 23 performances, as the farce was not to the taste of New York audiences. Carmichael was delighted by the early close, as he hated his time in the US and said "I found New York a disturbing, violent city and I disliked it instantly". As soon as he heard the production was to close, he sent a telegram to the BBC to note his availability to play Wooster. Carmichael negotiated a fee of 500 guineas (£525) per half-hour episode, and assisted in finding the right person for Jeeves, eventually selecting Dennis Price.
The first series of The World of Wooster received the Guild of Television Producers and Directors award for best comedy series production of 1965, and the programme ran for three series, broadcast between May 1965 and November 1967, comprising twenty episodes in total. Reviews for Carmichael were positive, with a reviewer in The Times declaring "The World of Wooster is also a triumph of casting, for Ian Carmichael and Dennis Price are perfect impersonators of two characters who are by no means lay-figures ... They are a priceless pair." A different reviewer pointed out one drawback of the 44-year-old Carmichael's performance: "If we have thought of Bertie Wooster as eternally 22, not far in time from enjoyably wasted university days, Mr. Ian Carmichael opposes our view with a Bertie who is older but hopefully fixed in an inescapable mental youth." The best review, as far as Carmichael and the producer Michael Mills were concerned, was from Wodehouse, who sent a telegram to the BBC:
To the producer and cast of the Jeeves sketches.
Thank you all for the perfectly wonderful performances. I am simply delighted with it. Bertie and Jeeves are just as I have always imagined them, and every part is played just right.
Bless you!
P. G. Wodehouse
Wodehouse later reconsidered his opinion and thought Carmichael overacted in the role. Only one of the episodes remains: the others were wiped to reuse the expensive videotape.
In September 1970 Carmichael was the lead role in Bachelor Father, a sitcom loosely based on the true story of a single man who fostered twelve children. There were two series—one in 1970, one the following year—and a total of 22 episodes; he negotiated a salary of £1,500 per episode, making him the best-paid actor at the BBC. The media historian Mark Lewisohn thought that the programme, "although ostensibly a middle-of-the-road family sitcom of no great ambition, came over as a polished and professional piece of work that pleased audiences over two extended series".
Carmichael was one of the driving forces behind the BBC's decision to adapt Dorothy L. Sayers's Lord Peter Wimsey stories for television. He first had the idea of appearing as Wimsey in 1966, but various factors—including financing, Carmichael's association with Bertie Wooster in the public's eye and difficulty obtaining the rights—delayed the project. By January 1971, however, they were able to start filming the first programme, Clouds of Witness, which was broadcast in 1972 in five parts. This was followed by The Unpleasantness at the Bellona Club, Murder Must Advertise, The Nine Tailors and The Five Red Herrings between February 1973 and August 1975. Richard Last, writing in The Daily Telegraph thought Carmichael was "an inspired piece of casting. ... he has exactly the right outward touch of aristocratic frivolity but more than the ability to suggest the steel underneath". Clive James, reviewing for The Observer, described Carmichael as "an extremely clever actor", and thought he was "turning in one of those thespian efforts which seem easy at the time but which in retrospect are found to have been the ideal embodiment of the written character". Carmichael went on to play Wimsey on BBC Radio 4, recording nine adaptations with Peter Jones as Mervyn Bunter, Wimsey's valet.
In 1979 Carmichael appeared in The Lady Vanishes, which starred Elliott Gould and Cybill Shepherd; the film was a remake of Alfred Hitchcock's 1938 film of the same name. Carmichael appeared as Caldicott alongside Arthur Lowe's character Charters, two cricket-obsessed English gentlemen; the roles were played in the original by Naunton Wayne and Basil Radford. The journalist Patrick Humphries, while describing the film as "lamentable", thought that only Carmichael and Lowe "emerge with any credibility". Carmichael was interviewed on Desert Island Discs for a second time in June 1979.