However, due to the COVID-19 pandemic, it was pushed back to early 2021; in January of that year, all six episodes were immediately made available on the ITV Hub, receiving an average of 7.9 million views.

[4] Christie decided to leave the show following production on the second series and Marsha Thomason was cast as the new lead, DS Jenn Townsend.

[6] [7][8] Detective Sergeant Lisa Armstrong (Morven Christie) is the mother of two children and working for the fictional West Lancashire Police Service as a Family Liaison Officer (FLO).

She is called out on the case of two missing teenagers, only to find the married stepfather of the twins is someone with whom she had sex the night before in an alley behind a pub.

Lisa's interaction with Sean (Jonas Armstrong) has been caught on CCTV,[9][10] but she deletes the footage rather than coming clean and admitting to the one-night stand, complicating the investigation.

DS Townsend (Marsha Thomason) is immediately thrown into the deep end when a body is found in the bay on her first day in the job.

[22] Rachel Sigee, reviewing for the newspaper i, also gave it four stars praising Christie and suggesting "This engrossing first episode scattered enough clues [...] to set up an intriguing thriller".

[23] Anita Singh, reviewing for The Daily Telegraph, rated the first episode three stars out of five calling it "a refreshing return for this bracing seaside cop show",[24] while Sean O'Grady for The Independent was more critical, commenting that "though the actors put in some commendable performances, they are all lumbered with carelessly constructed, barely two-dimensional characters" and gave it two stars.