The Best Episodes Directed By Thaddeus O'sullivan

When a young man disappears on the Aberdeen to Shetland ferry crossing and a small boy ends up in intensive care, DI Jimmy Perez and his team investigate, becoming convinced the two events are connected.

Vera and her team investigate the fatal stabbing of an ex-Met police officer outside a busy Newcastle nightclub.

Investigating a mysterious death, DCI Vera Stanhope finds herself in a quiet coastal town with clues that keep revolving around one street.

DI Jimmy Perez is convinced that Michael Maguire is somehow implicated in the death of Robbie Morton. But with the investigation seemingly under threat before it's even started, he faces an uphill battle to uncover the truth behind Maguire's silence.

The murder investigation takes Perez and Tosh to Glasgow as they try to uncover the reasons behind Maguire's brutal death and his connection to Robbie Morton. But old ghosts return to haunt Perez as his enemies try to prevent him from getting to the truth.

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.

A chance encounter with an impoverished child forces Trixie to see an unfamiliar darker side of life. As Nonnatus House welcomes a new resident, Nurse Barbara Gilbert, Tom Hereward has a surprise romantic gesture in store for Trixie.

Maigret investigates the murders of two women who are seemingly unconnected yet share a mysterious bond. The first, Arlette, is a beguiling showgirl from a seedy club who arrives at the police station to report two men she overheard discussing the murder of a Countess. But Arlette is shifty and eventually rushes from the building, only to be found strangled in her apartment the next morning. Meanwhile, Maigret hears word of a Countess who has also been found strangled, her valuables untouched and only a few mysterious leads for the detective to follow up. What connects the two? And should Maigret have done a better job of protecting Arlette when she came to him in her hour of need?

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.