“There is much debate over whether to engage with or meet this stranger, and loyalties are tested even before a decision is made,” reads the official synopsis for the six-part thriller.

“But ultimately, the siblings meet the man who claims to share their DNA, a strange loner from out of town called Connor (Jordan Wilks), and the spitting image of their recently deceased brother Liam.

“As Christine realises her hold over her precious, dysfunctional family is under threat, she seeks to keep Connor at bay, denying his claims. But it’s clear to Connor that Christine is keeping a dark secret, and he’s determined to uncover the truth.

“Meanwhile Connor begins to ingratiate himself into the lives of his so-called siblings, winning their trust and testing their relationship with an increasingly desperate Christine. But is Connor telling the truth? And if he’s lying - if he is, as Christine claims, an imposter - why is he lying?”

Sounds intriguing…

The Pact series 2: the trailer for BBC One’s smash hit crime thriller has landed