Callum Todd was the champion of Series 69, the first non-octochamp series winner since Series 46 when only 6 heat wins were allowed, and a quarter-finalist in Championship of Champions XIV. During his finals he defeated three members of the 900 club, meaning he has had one of the most difficult series-final runs in the history of Countdown.
After scraping through his first 3 games, he joined Apterous and greatly improved his performances in his next 4 shows before controversially losing to Abdirizak Hirsi on a tie-break conundrum in his 8th game. However, his 7 wins and 747 points were enough to see him qualify for the finals as the #7 seed.
In the quarters, he was up against the record-breaking #2 seed, Jen Steadman, and after falling behind early on, he turned it around to win by 3 points in a 108 – 105 game on an unsolved crucial conundrum. His semi-final saw him take on the #3 seed, Glen Webb, and despite his 6 small numbers games letting him down, he managed to put in a convincing 107 – 82 victory to take him into the final against the record-breaking octototaller Dylan Taylor.
Todd went behind in the first round, but equalised immediately, and both contestants maxed the next 12 rounds, leading to the crucial conundrum IHURTPALM, which Todd solved after 4.5 seconds to win the final with a score of 126 – 116. The final also saw him score his highest total on the show and become the first finalist ranked in the lower half of the seed table to win a 15-round series.
Todd's next televised Countdown appearance was in Championship of Champions XIV at the start of 2016, where, in the preliminary round, he squared off against Series 70 semi-finalist Samir Pilica. Todd opened an early lead in this episode by outclassing Pilica on the first two numbers games and spotting the darrenic word TOASTIER. Hereafter, he held onto this lead consistently, scoring in all but one of the remaining letters rounds and spotting the conundrum ROMANYIPS in fairly short order. This performance gave him a winning score of 127, bettering his previous personal best by 1 point, to Pilica's 88, bringing him into the quarter-finals and setting up a rematch with his Series 69 opponent Jen Steadman. Unfortunately for Todd, history did not repeat itself and he lost 107 – 85, infamously declaring SRSLY.
In 2016, Todd hosted his first Co:event, the inaugural Leeds tournament Countdown in Leeds 2016.
On 02 March 2018, during Episode 6775, he was the audience member that solved the conundrum HAVENOCAT.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|5779||27/09/2013||P||Ritch Greenwood||58 – 70||Callum Todd||Katherine Grainger||Susie Dent||125|
|5780||30/09/2013||P||Callum Todd||83 – 66||Adam Dexter||Katherine Grainger||Susie Dent||120|
|5781||1/10/2013||P||Callum Todd||79 – 55||John Blaker||Katherine Grainger||Susie Dent||121|
|5782||2/10/2013||P||Callum Todd||101 – 40||Breda Sexton||Michaela Strachan||Susie Dent||133|
|5783||3/10/2013||P||Callum Todd||103 – 74||Ben Hendry||Michaela Strachan||Susie Dent||122|
|5784||4/10/2013||P||Callum Todd||108 – 61||Lucy Bryden||Michaela Strachan||Susie Dent||133|
|5785||7/10/2013||P||Callum Todd||114 – 77||Chris Allum||Michaela Strachan||Susie Dent||123|
|5786||8/10/2013||P||Callum Todd||89 – 99*||Abdirizak Hirsi||Michaela Strachan||Susie Dent||135|
|5834||13/12/2013||QF||Jen Steadman||105 – 108||Callum Todd||Dan Walker||Susie Dent||133|
|5838||19/12/2013||SF||Callum Todd||107 – 82||Glen Webb||Richard Madeley||Susie Dent||138|
|5839||20/12/2013||GF||Dylan Taylor||116 – 126||Callum Todd||Richard Madeley||Susie Dent||134|
|6283||11/01/2016||CP||Callum Todd||127 – 88||Samir Pilica||John Inverdale||Susie Dent||137|
|6288||18/01/2016||CQF||Jen Steadman||107 – 85||Callum Todd||Naga Munchetty||Susie Dent||125|