Van Der Valk

ITV, today, 8pm

The surly detective is hunting the killer of diamond polisher Ahmed Baykam.

His corpse has been cut in three; each part was found on the doorsteps of his employers, the clearly dysfunctional Cuyper siblings.

Van Der Valk thinks there were two possible motives – a grudge against the family, or professional jealousy. Marc Warren stars.