Croy began his Countdown début on 17 June 2011 as one of two brand new contestants following the octorun of the eventual series winner Graeme Cole. Croy lasted until his 6th show until he was narrowly defeated by Andrew Halliburton 90 – 91 after his opponent guessed the conundrum MARQUETRY a fraction before the clock had completed 30 seconds. His 5 wins and 538 points were not enough to reach the series finals.
In late 2012, Croy was invited back to Countdown in a themed 'Law & Order' special episode against prison officer Craig Lingard. Croy was allowed to devote the show to the memory of his friends and colleagues Fiona Bone and Nicola Hughes who had been killed on duty weeks earlier, he used his appearance as a fundraiser in their memory for the charity 'Care of Police Survivors' (COPS). This show was finally broadcast in April 2015.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|5288||17/06/2011||P||Matt Croy||86 – 50||Barrie Crawford||Jon Culshaw||Susie Dent||117|
|5289||20/06/2011||P||Matt Croy||96 – 45||Pete Snowdon||Tim Vine||Susie Dent||119|
|5290||21/06/2011||P||Matt Croy||100 – 53||Mark Worsfold||Tim Vine||Susie Dent||119|
|5291||22/06/2011||P||Matt Croy||95 – 86||Chris Hemingway||Tim Vine||Susie Dent||129|
|5292||23/06/2011||P||Matt Croy||71 – 45||Kevan Nijjar||Tim Vine||Susie Dent||118|
|5293||24/06/2011||P||Matt Croy||90 – 91||Andrew Halliburton||Tim Vine||Susie Dent||114|
|S44||10/04/2015||S||Matt Croy||91 – 66||Craig Lingard||Paul Zenon||Susie Dent||117|