Viewpoint

When primary school teacher Gemma goes missing in Manchester, surveillance officers Martin and Stella are tasked with observing the prime suspect, Gemma's boyfriend Greg Sullivan.

Martin witnesses Greg coming to pieces in front of his eyes. But is this a guilty man trying to hide his secrets or a grieving partner on a mission to find Gemma?

Troubled Greg recalls tender times with Gemma. But shaken from his reverie, we find him wracking his brains with Zoe about what could have happened to Gemma. He asks Zoe if she thinks Gemma was having an affair.

Martin goes on a mission to dig deeper into Carl Tuckman's murky past. Could this relate to Gemma's disappearance in the present?

A birthday lunch held in Gemma's honour leads to secrets being exposed and a break for Martin comes from an unexpected source, as his illicit bond with Zoe deepens.