Career: After graduating, Palin presented TV show Now! and worked in light entertainment. In 1966, he and Jones began writing for BBC comedy shows. Three years later, they joined forces with John Cleese, Graham Chapman, Eric Idle and Terry Gilliam to front ground-breaking sketch show Monty Python's Flying Circus. A huge hit, 45 episodes were made between 1969 and 1974, as well as five films. Palin has also starred in movies including A Fish Called Wanda, A Private Function, and American Friends (which he also wrote), and appeared in acclaimed TV drama GBH. Since the mid-1980s, he's become famous for globetrotting programmes such as Around the World in 80 Days and Pole to Pole. He's written books to accompany each series, as well as two novels; three volumes of his diaries have also been published. He delivered 2013's Royal Television Society lecture.

Career: Attenborough joined the BBC in 1952, making his reputation with the groundbreaking Zoo Quest series, which he hosted for 10 years. He became controller of BBC2 in 1965, overseeing the advent of colour TV, and in 1969 was made BBC director of programming. In 1973, he returned to presenting with the series Eastwards With Attenborough and The Tribal Eye. In 1979, he wrote and presented Life On Earth and its sequel The Living Planet in 1984. The following year, he was knighted. He has since made several more programmes, such as Life in the Freezer (about Antarctica; 1993), The Private Life of Plants (1995), The Life of Birds (1998), The Life of Mammals (2002), Life in the Undergrowth (2005) and Life in Cold Blood (2008), First Life (2010), Frozen Planet (2011) and Life Story (2014). He continues to narrate and present documentaries.