Grantchester (ITV, 9pm)

THE decision to combine tormented toff turned clergyman Sidney Chambers (Malton’s James Norton) with bluff-talking jack-the-lad detective Geordie Keating (Robson Green) in the not-so-sleepy Cambridgeshire village of Grantchester has earned ITV a healthy audience.

Author James Runcie, son of the late Robert who was one of our best-known Archbishops of Canterbury, based novels featuring unconventional clerical-sleuth Sidney on his father. He too was once a village priest, and served in the Scots Guards during the Second World War.

Runcie says his books are mostly imaginative, “but certainly a springboard was my father in trying to develop a series that was ethical as well as thrilling in terms of its plot and intrigue. Sidney Chambers is a loveable, committed priest who doesn't quite know what being a priest means fully. He tries to think the best of people and thinks it's important to hate the sin, but love the sinner. His principal characteristic is curiosity. He's interested in people and they trust him. So people tell him things and he can go where the police cannot. But what does he do with the information he is given? Who can he trust and who can he love?"

For the writer, Norton has been the perfect choice to bring his creation to the small screen.

"The two key things about James Norton are intelligence and charm. I find it really strange watching him because he doesn't look a million miles away from what my father looked like, especially in the Army flashbacks. It is beyond weird seeing somebody loosely based on your father who looks a bit like your nephew playing a loose version of your dad while being younger than you are," adds Runcie.

In this end of series episode, Amanda and Guy's wedding is fast approaching, so Sidney could do with something to take his mind off things, but a local policeman is killed and he’s drawn into another case with Geordie. Then Geordie's life hangs in the balance and the clergyman winds up being cut off from the investigation and the police close ranks.

But Sidney believes the police, led by one of the best baddies in the business David Troughton as Chief Insp Benson, are on the wrong track, so he ropes in Mrs Maguire (Tessa Peake-Jones) and Leonard (Al Weaver) to help him mount a daring mission to nail the killer.

But as he moves in on his culprit, it becomes clear that his motives stretch right back to events that took place in the Second World War. So between comforting Geordie's distraught wife (played by Kacey Ainsworth), and dealing with his own demons, Sidney must face his own desire to self-destruct.

How Rich Are You? (Channel 4, 8pm)

THIS one-off special illustrates where each of us stand in the great money map of Britain - and what that position means. As the UK has been officially declared the most unequal society in Europe, Richard Bacon, the experts and the studio audience examine the consequences of the income divide. Oh, and if you want to test yourself at home and see whether you're as rich - or poor - as you think you are, there's an app for that developed by Channel 4 in association with the Institute for Fiscal Studies.

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