Happy Valley fans have worked out how one background character could be heavily involved during the show's final scenes.
Viewers predict Alison Garrs will play an integral part in Catherine Cawood and Tommy Lee Royce's possible deadly battle on Sunday night, thanks to spotting a telling sign in the credits for the final episode of the crime drama.
Ahead of the BBC series coming to an end this weekend, a teaser for the conclusion has been released - with a the 22-second preview promising some tense and dramatic scenes.
