Smith first appeared on 23 November against 6-time winner and usually dominant player in the form of previous Series 61 contestant Martyn Simpson. Smith proved to be Simpson's toughest opponent, beating him in the first numbers round to take the lead. However, Simpson risked POLEWARD in round 7 to take the lead by one point, and later extended his lead in round 11 before Smith clawed back in round 12. Smith finally unseated Simpson on a crucial conundrum to win his first game. Smith continued a very solid run of performances, including spots of nine-letter words such as ORIENTALS and COLOURIZE, solving six conundrums and achieving seven centuries. Smith wrapped up with a total of 869 points to place 3rd in the seed table.
12 days after completing his octochamp run, Smith began his finals campaign against number 6-ranked Phil Hulme in the third quarter-final match. Both players exchanged the lead frequently while remaining within the crucial 10-point margin in a very tense fight. However, Smith's victory was eventually confirmed by the end of the final numbers round by nabbing 7 points in a 6-small gamble from Hulme. Smith then took on number 2 seed Sam Cappleman-Lynes in the second semi-final. Both players found REFASHION in the first letter round. Sam took a convincing lead, but Smith beat him in three letter rounds spotting PARBOIL, TWOCKED and DOPAMINE. However it wasn't enough as Sam broke away and won the game with 124 points as Smith bowed out in his first defeat with 83 points, and finished with an overall score of 952 points in his series run.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|7394||23/11/2020||P||Martyn Simpson||95 – 104||Leo Smith||Tim Rice||Susie Dent||138|
|7395||24/11/2020||P||Leo Smith||105 – 70||Jonnie Masterson||Tim Rice||Susie Dent||121|
|7396||25/11/2020||P||Leo Smith||126 – 40||Steve Whatmore||Samira Ahmed||Susie Dent||146|
|7397||26/11/2020||P||Leo Smith||114 – 81||Isabella Roper||Samira Ahmed||Susie Dent||134|
|7398||27/11/2020||P||Leo Smith||107 – 51||Amaar Iqbal||Samira Ahmed||Susie Dent||154|
|7399||30/11/2020||P||Leo Smith||102 – 61||Joe Timmins||Samira Ahmed||Susie Dent||124|
|7400||1/12/2020||P||Leo Smith||115 – 83||Liam Coles||Samira Ahmed||Susie Dent||124|
|7401||2/12/2020||P||Leo Smith||96 – 93||Nicola Newton||Nina Wadia||Susie Dent||125|
|7409||14/12/2020||QF||Leo Smith||91 – 80||Phil Hulme||John Inverdale||Susie Dent||123|
|7412||17/12/2020||SF||Sam Cappleman-Lynes||124 – 83||Leo Smith||Levi Roots||Susie Dent||157|