Meet the cast of Death in Paradise series six

When we first meet Jack he's a Met officer who gets the job of looking after the visiting Caribbean officers. But when Humphrey decides to stay in London, Jack heads to Saint Marie in his place.

We know that he's a recent widower with a grown-up daughter. And from what we've seen so far, he has a roundabout way of getting to the point with the use of anecdotes – but underneath his slightly-naive, eccentric exterior, he's a very sharp detective.

Who is Ardal O’Hanlon?

You'll probably recognise the hapless Father Dougal McGuire, a priest on Father Ted’s Craggy Island, though he's been in plenty of TV shows since.

Grace Stone as Ardal O'Hanlon's daughter Siobhan Mooney

Who is Siobhan Mooney?

Jack's daughter, who is in her early 20s. She's just lost her mother, and may well be moving to Saint Marie with her dad.

Who is Grace Stone?

She's had bit-parts in Call the Midwife and Doctors, but this could be Stone's TV breakthrough.