Series 23

Can you help the Met find a gunman who shot a nine-year-old girl, leaving her with life-changing injuries? Also, an exclusive film with the detectives who ensured serial killer Steve Wright was jailed for the murder of Victoria Hall.

Does a shoe print left at a murder scene hold the key to solving a tragic cold case? And how a grandmother used her family to distribute almost a ton of cocaine.

The staggering investigation into the crypto queen jailed over her £5bn bitcoin stash. And can you help solve the murder of Melanie Hall, who disappeared after a night out in Bath?

A heartfelt plea to find those who shot 16-year-old Amaan Shakoor in London in 2018. And how police caught the killer of an army veteran who was dumped in a disused building in Scotland.

The tragic killing of 15-year-old Elianne Andam, who was killed after a row about a teddy bear. And do you know who stabbed much-loved family man Paul McGrath in a violent attack?

In 1986, Diane Sindall was found dead in an alleyway – can you help solve a 40-year-old mystery? Also on the programme, how brave officers rescued a woman trapped on Aberavon Beach.

A sister pleads for help to find the people who shot her brother in a tragic case of mistaken identity. Also on the programme, officers race against the clock to save a woman from her sinking car.

Essex Police need urgent help with finding a suspect of a gruesome murder. Also on the programme, how a gang brazenly stealing high-value cars was finally caught.

Do you recognise the men in a smash-and-grab in which over £200k worth of bags were stolen? Also on the programme, the NCA hone in on a gangland armourer.

How police solved a jaw-dropping murder plot that had been staged to look like a suicide. And have you seen Ronald Ellis, who has been missing for over 20 years?

In 2005, two best friends died in an arson attack while sleeping – but who lit the fire? Also on the programme, a game of cat and mouse to catch a dangerous criminal sees a manhunt across continents.

How a far-right extremist, who had printed his own 3D gun, was jailed for terror offences. And can you help find the driver in a hit-and-run in Runcorn?

Heroin police catch a gang trafficking £7m worth of the drug across the UK. And detectives need help to solve a disturbing rape from 1987.

How police jailed three organised crime groups in one swoop for their roles in a £53m drug empire. And can you help solve the murder of trainee nursery assistant Camille Gordon, who was killed in London's Soho?

How a bookkeeper took nearly £900,000 from an elderly couple she had befriended. And police want to identify a man they believe was killed in a forest in north Wales.