by King Richard I of England as "Sir Ian of Jaffa". After many travels, Ian and Barbara eventually use a Dalek time machine to go home, two years after their disappearance (The Chase). The character of Ian was intended by the production team to return for a guest appearance in the 1983 Doctor Who story Mawdryn Undead, but this plan fell through when Russell proved to be unavailable. The script was modified to instead feature Alistair Lethbridge-Stewart as the story's schoolteacher character. However, in 1999 Russell did return to the part for the BBC Worldwide video release of The Crusade, two of the four episodes of which are missing from the archives. Russell provided linking narration between the existing episodes in character as an aged Ian Chesterton reminiscing about the events of the story. Following his departure, Ian has been name-checked on a number of occasions in the series: He was mentioned by Vicki in episode one of The Time Meddler; by the first Doctor in episode four of The Massacre of St Bartholomew's Eve and again by his third incarnation on Spiridon in episode one of Planet of the Daleks. Ian was also mentioned in episode one of the 1993 Children In Need charity special Dimensions In Time and again in Death of the Doctor, a two part story in the fourth series of The Sarah Jane Adventures. After meeting Jo Grant and the Eleventh Doctor, Sarah Jane Smith reveals that she has researched the lives of some of the Doctor's earth-bound companions and discovered that Ian and Barbara have married each other, become professors, live in Cambridge and are rumoured to have not aged since the 1960s. In the 50th Anniversary Special "The Day of the Doctor", the sign for Coal Hill Secondary School identifies the Chairman of the Governors as I. Chesterton. In the spin-off series Class, it was revealed in the episode "Brave-ish Heart" that the Board of Governors had been removed when the school was refurbished as an Academy. Russell reprised his role as Ian in the 2022 special "The Power of the Doctor" alongside several other former companions who have gathered together as a support group to talk of their experiences with the Doctor. Ian expresses surprise that the Doctor has become a woman. With this appearance, Russell broke the Guinness World Record for the "Longest gap between TV appearances" at . Other media