In 2015, five years after joining c4countdown, Benjamin finally appeared on the show on the very first programme of Series 73. Playing returnee James Judge, Benjamin never took the lead during the game, with him being 16 points behind Judge at one point. However, seven crucial points on the final numbers game took the game level, and Benjamin unravelled GADWINNER in five seconds to return to Harrow with a teapot. He went on to win another 4 games hereafter, amassing a total of 484 points (not including the GADWINNER solve, which was actually a tie-break) across six shows to equal the number of wins needed to qualify for the finals. However, his total was exceeded by Matty Artell's 541, preventing him from entering.
Outside of Countdown, Benjamin is also a big fan of the London Underground, and in 2013 attempted to beat the World Record for travelling to all the stations on the network, a record previously held by former contestant Jack Welsby. Benjamin was unable to beat the time, recording 17 hours, 18 minutes, and 18 seconds. He is also a fan of Fulham F.C. and a keen Conservative Party activist: one of his ambitions in life is to be Prime Minister.
Benjamin's former Chemistry teacher, Kwaku Sapong, appeared on Countdown in 1994.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|6157||15/06/2015||P||James Judge||68 – 78||Rhys Benjamin||Colin Murray||Susie Dent||124|
|6158||22/06/2015||P||Rhys Benjamin||92 – 63||Michael Stokes||Colin Murray||Susie Dent||131|
|6159||23/06/2015||P||Rhys Benjamin||81 – 53||Maxine Jones||Colin Murray||Susie Dent||123|
|6160||24/06/2015||P||Rhys Benjamin||78 – 59||Abby Foulkes||Colin Murray||Susie Dent||118|
|6161||25/06/2015||P||Rhys Benjamin||89 – 65||Olly Hall||Colin Murray||Susie Dent||120|
|6162||26/06/2015||P||Rhys Benjamin||76 – 98||Pat Lonergan||Joe McElderry||Susie Dent||144|