TV Guide Alibi Saturday

The theft and subsequent criminal misuse of DC Tomlin's warrant card adds to DI Raine's troubles as she identifies the body of a local drugs dealer and faces an outbreak of gang warfare on her patch - and it's not long before a second corpse is retrieved from the canal. Police drama, starring Pauline Quirke and Steve John Shepherd

Maisie investigates a fire-bombing at the home of a former policeman who suspects he's being targeted by an ex-convict, and Tomlin receives a series of obscene phone calls from someone who always knows when she's alone. Pauline Quirke and Rakie Ayola star

The crime-solving cleric takes the lead when a television dancing competition turns deadly. Angela Rippon guest stars as the Dancing Duchess, the host of the contest, alongside regulars Mark Williams, Claudie Blakley and Ruby-May Martinwood

A group of astronomers gathers on the cliffs of Saint Marie to watch Jupiter and Saturn align - a once-in-a-lifetime planetary event. However, one of its number - renowned professor Bertrand Sworder - meets an untimely death. The circumstances of his demise warrant the involvement of Neville and Naomi, who soon learn there was some professional hostility towards Sworder. Back at the station, Darlene announces that she has passed her exam and is ready to be a trainee officer. Caribbean-set detective drama, starring Ralf Little, Don Warrington and Tahj Miles

The team investigates a survivalist commune when one of its members is poisoned inside a locked bunker. However, with CCTV footage showing that no one went in or came out while he was in there, it seems likely that he has taken his own life - or has he? Meanwhile, Neville has a series of adventurous dates with Sophie. Robert Webb guest stars