She was a Local Government Secretary from Highgate, North London. She won 3 games in the heats before losing to Malcolm Mackinnon. This was enough to see her return for the final rounds as #8 seed, and she beat Lew Schwarz and Nick Saloman on her way to the final against Barry Grossman. However, McLeod lost the final 99 – 67, Grossman's quicker conundrum finger being the major difference between the two.
McLeod also played in the Supreme Championship, beating series champions Lawrence Pearse and Clive Spate in the first and second rounds respectively, before losing to Joyce Cansfield in the group finals.
She returned to Countdown in 2013, as one of 41 contestants taking part in the 30th Birthday Championship. She lost her only match in a rematch of the final against Barry Grossman by a score of 79 – 65.
She is also a Scrabble expert and has appeared on several quiz shows, including the short-lived Channel 4 show Beat the Nation in 2004 and the BBC's !mpossible in 2017. She has also won an episode of The Weakest Link
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|1077||11/01/1991||P||Robert Houston||35 – 52||Jackie McLeod||Dinah Sheridan||Catherine Clarke||71|
|1078||14/01/1991||P||Nimmy Aslam||28 – 46||Jackie McLeod||Dinah Sheridan||Catherine Clarke||76|
|1079||15/01/1991||P||Susan Gould||18 – 58||Jackie McLeod||Hayley Mills||Freda Thornton||64|
|1080||16/01/1991||P||Malcolm Mackinnon||45 – 31||Jackie McLeod||Hayley Mills||Freda Thornton||82|
|1126||21/03/1991||QF||Jackie McLeod||55 – 33||Lew Schwarz||Sally James||Judy Pearsall||72|
|1130||27/03/1991||SF||Jackie McLeod||50 – 27||Nick Saloman||Brian Johnston||Richard Samson||67|
|1132||29/03/1991||GF||Jackie McLeod||67 – 99||Barry Grossman||Sally James, Brian Johnston||Richard Samson||117|
|1328||4/01/1993||CQF||Chris Waddington||59 – 49||Jackie McLeod||Richard Stilgoe||Susie Dent||71|
|1876||7/11/1996||dQF||Lawrence Pearse||45 – 47||Jackie McLeod||Geoffrey Durham||Susie Dent||81|
|1879||12/11/1996||dSF||Jackie McLeod||49 – 46||Clive Spate||Barry Cryer||Susie Dent||74|
|1880||13/11/1996||dF||Jackie McLeod||42 – 50||Joyce Cansfield||Barry Cryer||Susie Dent||70|
|5621||15/01/2013||30BP||Jackie McLeod||65 – 79||Barry Grossman||Martin Lewis||Susie Dent||119|