[2] Undercover follows the lives and family of Maya Cobbina, a British lawyer conducting a long-term legal fight to prove the innocence of US death row inmate Rudy Jones, and her husband Nick Johnson.

After Cobbina is head-hunted for the position of Director of Public Prosecutions, her husband's past – and the circumstances under which the couple first met twenty years earlier – comes back to haunt him.

Various members of the establishment then collude to have Julia appointed as her newspaper's royal correspondent, a position which will prevent her from investigating Strickland's death.

Meanwhile, Maya decides to contact former police officer Aiden Rose, hoping that having retired he will be more willing to provide information about Antwi's death.

While accompanied by Dr Ambrose, an expert witness called by her mother, Clem tells Maya and Nick's son Dan this news.

Maya returns home and confronts Nick with the information she has about his false identity; he confesses, but says he stopped spying on her early in their relationship.

[8] Writing in British daily newspaper The Guardian, Chitra Ramaswamy admitted: "I came to Peter Moffat's excellent drama knowing nothing and was instantly confused, though gripped nonetheless.

She added: "Thankfully Moffat's writing is so good and the direction so assured I didn't mind not having a clue what was going on, even if at times it felt like at least three different dramas were playing out in tandem."