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.

Martin prepares Carl to confront Kate in the hopes of a confession, but the surveillance operation takes an unexpected turn, leading to devastating consequences.