After a heartwarming Christmas special, James Norton and Robson Green will return as the unlikely 1950s crime-fighting duo, Vicar Sidney Chambers and Police Inspector Geordie Keating, in Grantchester, based on The Grantchester Mysteries by James Runcie.

In the third series of Grantchester new Archdeacon Gabriel Atubo reminds Sidney that as clergyman he must put duty above his own needs and lead by example. Given the strength of his feelings for Amanda, is this something that Sidney can do?