Less than two months after Ryan's Series 44 shows, he finished as the runner-up in an episode of The Weakest Link on 19 February 2001.
Prior to appearing on Countdown, he twice appeared on Fifteen to One, in 1999, finishing first and third.
Ryan's partner, Suzy Turner, won three games on Countdown two weeks before his Series 76 appearance. They appeared together on Only Connect on 5th November 2018.
He is also an Apterite.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|2912||26/12/2000||P||Robert Roden||35 – 42||Dave Ryan||Joan Bakewell||Damian Eadie||72|
|2913||27/12/2000||P||Dave Ryan||45 – 47||Colin Mackay||Joan Bakewell||Damian Eadie||74|
|6504||24/01/2017||P||Sam Wickham||42 – 89||Dave Ryan||Barry McGuigan||Susie Dent||126|
|6505||25/01/2017||P||Dave Ryan||97 – 63||Elizabeth McCann||Barry McGuigan||Susie Dent||120|
|6506||26/01/2017||P||Dave Ryan||90 – 103||Elliott Mack||Barry McGuigan||Susie Dent||126|