Episode list

Genetecist Yvonne Carmichael is approached by a stranger who is impressed by her speech to a Commons select committee and with whom she finds herself having anonymous sex in a broom cupboard - a fact she obviously keeps from husband Gary. Nonetheless she is excited by experience and, suspecting Gary of having sex with his research assistant Rosa, continues the purely carnal affair, largely in public places where they could risk detection, such as Apple Tree Yard with its CCTV. However colleague George Selway finds out and lets Yvonne know in a very brutal way.

In the aftermath of the attack Yvonne shuts down, unable to report the crime to the police or open up to her husband about it. Things get worse when her attacker begins stalking her. Terrified she turns to her lover.

Yvonne's life is turned upside down yet again as she is ripped away from her family and arrested for the murder of George Selway, along with Costley. In shock, Yvonne denies everything. As their trial begins, Yvonne quickly realises that everything she thought she knew about Mark Costley was based on a lie.

The murder trial continues, with Costley's lawyer Bonnard basing her defence on evidence that Costley suffers from a personality disorder which would have impeded his ability to react normally during an altercation with Selway. The prosecution attack this claim. When Yvonne finally takes to the stand, she sticks firmly to her story and confidently holds her own.