It’s the final instalment of this tense thriller series and the big question is: will everyone finally discover that nurse Cath has stolen the identity of her best friend, senior doctor Ally Sutton?

There have been lots of near-misses at work and in her personal life – and now things are set to get even more complicated as Cath’s ex, Karl (Blake Harrison), arrives in Edinburgh from Sheffield hoping to win her back and desperate to prove that he can be a better dad to their daughter Molly.

As the web of lies begins to unravel, how far will she go in order to protect her perfect new life as Ally? Nail-biting to the end!