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 #4 seed for the quarter-finals, inevitably setting him up for a close match against #5, fellow Apterite Ned Pendleton. For a time, Pendleton led by 8 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 Edward McCullagh, who would go on to become series champion.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|5220||8/03/2011||P||Michelle Nevitt||54 – 94||Andy McGurn||John Parrott||Susie Dent||121|
|5221||9/03/2011||P||Andy McGurn||64 – 58||Adam Fleetwood||John Parrott||Susie Dent||120|
|5222||10/03/2011||P||Andy McGurn||110 – 56||Pam Hill||John Parrott||Susie Dent||120|
|5223||11/03/2011||P||Andy McGurn||76 – 47||Michael Hastings||John Parrott||Susie Dent||117|
|5224||21/03/2011||P||Andy McGurn||94 – 87||James Hall||Donal MacIntyre||Susie Dent||119|
|5225||22/03/2011||P||Andy McGurn||82 – 52||Emily Finnan||Donal MacIntyre||Susie Dent||129|
|5226||23/03/2011||P||Andy McGurn||96 – 83||Peter McLoughlin||Donal MacIntyre||Susie Dent||126|
|5227||24/03/2011||P||Andy McGurn||86 – 56||John Maddox||Donal MacIntyre||Susie Dent||149|
|5275||31/05/2011||QF||Ned Pendleton||89 – 99*||Andy McGurn||Gregg Wallace||Susie Dent||118|
|5276||1/06/2011||SF||Adam Gillard||108 – 52||Andy McGurn||Gregg Wallace||Susie Dent||133|