Leo comes under suspicion for fraud when an insurance investigator accuses him of falsifying a post-mortem report, and Harry falls for the charms of an attractive former colleague.

Harry and Nikki try to remain professional when they find themselves on opposite sides of a high-profile case, but it's not easy as they're both brilliant at what they do, and they soon show that every piece of evidence can be interpreted at least two ways.

The revelation that Flannery's first wife also died of a stair fall sends Harry to Prague to seek evidence to prove the man's guilt. However, Nikki's determination to look beyond the police's blinkered investigation leads to further tragedy.

Leo is concerned that the police are involved with a cover-up to protect a rogue undercover cop linked to the death of a young woman.

With Danielle missing and her lover on the run, Leo and the police struggle to unravel a complex web of deceit.

Nikki and Harry try to help wounded victims of a campus shooting while trapped in the building with the rampaging shooter.

Leo's postmortem of the victims reveals there were two guns used, and possibly a second shooter.

When a Zimbabwean asylum seeker is unfairly deported to South Africa, Leo needs to find a way to help her return to the UK.

Nikki is forced to make some hard choices when she discovers that Anton has been less than honest with her.