Mackintosh produced Tomfoolery, a revue of Lehrer's songs that was a hit on the London stage. Lehrer was not initially involved with the show, but he was pleased with it; he eventually gave the stage production his full support and updated several of his lyrics for the show. Tomfoolery contained 27 songs and led to more than 200 productions, including an Off-Broadway production at the Village Gate which ran for 120 performances in 1981. Lehrer made a rare TV appearance on BBC's Parkinson show in conjunction with the Tom Foolery premiere in 1980 at the Criterion Theatre in London, where he sang "I Got It from Agnes". There were "Tomfoolery" performances in San Francisco about 1982 and in 2018–19. In 1993, he wrote "That's Mathematics" for the closing credits to a Mathematical Sciences Research Institute video celebrating the proof of Fermat's Last Theorem. On June 7 and 8, 1998, Lehrer performed in public for the first time in 25 years at the Lyceum Theatre, London as part of the show Hey, Mr. Producer! celebrating the career of Cameron Mackintosh, who had produced Tom Foolery. The June 8 show was his only performance before Queen Elizabeth II. Lehrer sang "Poisoning Pigeons in the Park" and an updated version of the nuclear proliferation song "Who's Next?" In 2000, Lehrer commented that he doubted his songs had any real effect on those not already critical of the establishment: "I don't think this kind of thing has an impact on the unconverted, frankly. It's not even preaching to the converted; it's titillating the converted ... I'm fond of quoting Peter Cook, who talked about the satirical Berlin Kabaretts of the 1930s, which did so much to stop the rise of Hitler and prevent the Second World War." Lehrer has said, jokingly, of his musical career: "If, after hearing my songs, just one human being is inspired to say something nasty to a friend, or perhaps to strike a loved one, it will all have been worth the while." In 2003, Lehrer commented that his particular brand of political satire is more difficult in the modern world: "The real issues I don't think most people touch. The Clinton jokes are all about Monica Lewinsky and all that stuff and not about the important things, like the fact that he wouldn't ban land mines ... I'm not tempted to write a song about George W. Bush.