The 6-episode first series was co-written by Welsh and Dean Cavanagh and broadcast in 2021 on BritBox, later moved in the UK to be available on ITVX.
[6] Production crews were reported in Glasgow's West End, with filming occurring on Horselethill Road and Rosslyn Terrace.
[12] Anita Singh in The Daily Telegraph described the performance of Scott as "lifting" the police procedural "out of the ordinary" by delivering "every line with a burning intensity" that still "manages at the same time to convey the character's emotional fragility, and the toll that his job is taking".
[13] Lucy Mangan in The Guardian was less effusive, but said that Welsh "pushed the limits of what we normally see from the troubled detective at the centre of such shows".
[14] Carol Midgely in The Times said "I thought it was terrific, give or take the odd daft scene" and "few writers could write about such horror and still make it funny".