Aidan Linge was a contestant in Series 75. He is also an Apterite, and appeared on Mastermind on BBC Two on 28 December 2020, winning his heat; Stephen Fuller, whom Linge beat on his Countdown début, appeared in the same series of Mastermind on 25 January 2021. Linge's Mastermind run ended in the semi-finals.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|6400||20/07/2016||P||Stephen Fuller||27 – 106||Aidan Linge||David James||Susie Dent||154|
|6401||21/07/2016||P||Aidan Linge||91 – 65||Ciarán Duffy||David James||Susie Dent||134|
|6402||22/07/2016||P||Aidan Linge||105 – 38||Lauren Wark||David James||Susie Dent||126|
|6403||25/07/2016||P||Aidan Linge||92 – 102*||Chris Leaney||David James||Susie Dent||125|