ITV3 TV Guide

Maggie, George and Ventress all become victims of poison pen letters, but when Nick investigates, it appears not everyone is admitting to receiving them

Roy and Bella investigate a murder on a council estate after a teenager is stabbed to death , with signs initially pointing to it being drug-related, but the victim's parents are adamant that their son had nothing to do with drugs. The investigation brings Grace face to face with someone from his past and stirs up old demons that worry Bella, with the case placing one of the team in grave danger. Meanwhile, Branson's investigation into a masked armed robbery leads to tensions in CID

The summer of 1959 finds the wedding season in full swing in the Cambridgeshire village of Grantchester. Among the Reverend Will Davenport's many brides-to-be is Adele Fitzgerald, who lives on the once-splendid, but now declining Fitzgerald Estate with her green-fingered spinster sister Maude. The body of a dead man is found in the grounds and is quickly identified as the sisters' errant brother Lord Edmund Fitzgerald, who has been living an itinerant life travelling the world since the war. Will and DI Geordie Keating find themselves at odds with Geordie's new boss DCI Elliot Wallace and DC Larry Peters in viewing the death as a murder. As Will and Geordie investigate the Fitzgerald family history, they find themselves looking into Edmund's own romantic past. Drama set in the 1950s, starring Robson Green, Tom Brittney, Tessa Peake-Jones and Emma Cunniffe

Lester Carmichael, part of the husband-and-wife team who own the Carmichael's cleaning goods brand, is found dead with a rather unusual neck wound. Will and Geordie's investigation leads them to look into Lester's private life, which, they discover, is much less spotless than the carefully curated image he and his wife Melanie like to present to the public. Robson Green stars

A case from 13 years earlier returns to haunt Lewis when the evidence comes under review. Graham Lawrie was incarcerated in a secure psychiatric hospital after being found guilty of the murders of three police officers, but now the findings of the forensics lab have been called into question and an appeal has been launched. As Lawrie remains locked up ahead of his day in court, PC Mark Travis is lured to an isolated location with a hoax call and falls victim to a killer who uses the same weapon as that used in the original murders