McGurn first appeared midway through Series 64, stopping the run of future finalist Michelle Nevitt by defeating her 94 – 54. After a lower score in his second game, he climbed to 110 in his third, by way of the impressive ADAGIOS and KATIPOS as well as perfect numbers and conundrum rounds. Although this proved his only century, McGurn stayed alive, going on to defeat five more opponents to retire as an octochamp with 702 points.
McGurn was No. 4 seed for the quarter-finals, inevitably setting him up for a close match against No. 5 seed and fellow Apterite, Ned Pendleton. For a time, Pendleton led by eight points, but McGurn caught back up with TOMATINE, and a laughably easy final numbers game was followed by a conundrum that neither player was able to unscramble in the time. A second conundrum, ONIONPIGS, was thus necessary. Pendleton buzzed first, but his answer was incorrect, leaving McGurn to correctly get POISONING and win. In the semi-finals, however, he was defeated by Adam Gillard.
|#||Date||Type||Contestant 1||Score||Contestant 2||Presenters||Guest||Lex||Max|
|5220||8/03/2011||P||Michelle Nevitt||54 - 94||Andy McGurn||Jeff Stelling||Rachel Riley||John Parrott||Susie Dent||121|
|5221||9/03/2011||P||Andy McGurn||64 - 58||Adam Fleetwood||Jeff Stelling||Rachel Riley||John Parrott||Susie Dent||120|
|5222||10/03/2011||P||Andy McGurn||110 - 56||Pam Hill||Jeff Stelling||Rachel Riley||John Parrott||Susie Dent||120|
|5223||11/03/2011||P||Andy McGurn||76 - 47||Michael Hastings||Jeff Stelling||Rachel Riley||John Parrott||Susie Dent||117|
|5224||21/03/2011||P||Andy McGurn||94 - 87||James Hall||Jeff Stelling||Rachel Riley||Donal MacIntyre||Susie Dent||119|
|5225||22/03/2011||P||Andy McGurn||82 - 52||Emily Finnan||Jeff Stelling||Rachel Riley||Donal MacIntyre||Susie Dent||129|
|5226||23/03/2011||P||Andy McGurn||96 - 83||Peter McLoughlin||Jeff Stelling||Rachel Riley||Donal MacIntyre||Susie Dent||126|
|5227||24/03/2011||P||Andy McGurn||86 - 56||John Maddox||Jeff Stelling||Rachel Riley||Donal MacIntyre||Susie Dent||149|
|5275||31/05/2011||QF||Ned Pendleton||89 - 99*||Andy McGurn||Jeff Stelling||Rachel Riley||Gregg Wallace||Susie Dent||118|
|5276||1/06/2011||SF||Adam Gillard||108 - 52||Andy McGurn||Jeff Stelling||Rachel Riley||Gregg Wallace||Susie Dent||133|