A new run of the 999 series begins tonight on Channel 4 at 10.05pm, delving into complex crime cases. In the first episode, police in Suffolk investigate a fatal stabbing where a man killed a suspected thief outside his home. Meanwhile, in Hertfordshire, a car linked to a woman reported for drug dealing is found on fire. Through footage and interviews with officers and victims, the episode unravels details of stalking, lies, and a lead back to someone under a protection order.
Other highlights include a documentary on ITV1 at 9pm, which examines a crime that shocked Northern Ireland over three decades ago. For the first time, the Howell children give interviews, revealing they grew up believing their mother had taken her own life, only to discover a darker truth still emerging.
At 9pm on Channel 4, an investigation into Carson Grimes, one of the UK's worst serial paedophiles, is featured. Already serving a life sentence, Grimes faces a fresh inquiry after a flood of new accusations, leading officers to uncover more victims and a troubling discovery of bones near his former home.
The season finale of the 70s-set Navajo cop drama Dark Winds airs at 9pm on U&Alibi. The NTP's train station stakeout may finally yield results, but not before Joe and Gordo share a reflective moment from their hiding spot.
On BBC Two at 9.45pm, Tom Davis hosts the penultimate night of comedy from the Hammersmith Apollo, introducing rising British-Kurdish star Kae Kurd and Newcastle standup Louise Young. Later, at 10.15pm on BBC Three, Lucia Keskin's deadpan sitcom continues, with Bridget Christie joining as a dodgy therapist.
