Episode 1

S04 E01 • Monday, Jun 16, 2025 • Jun 16 • 28m

A jacket left behind in a stolen car carries the DNA to prove who was driving the vehicle. And a witness gives police key evidence from 30 years ago to crack a cold-case murder.

Episode 2

S04 E02 • Tuesday, Jun 17, 2025 • Jun 17 • 28m

A reclusive millionaire is found murdered in his home in west London, and police find hundreds of thousands of pounds in cash still there.

Episode 3

S04 E03 • Wednesday, Jun 18, 2025 • Jun 18 • 28m

A fatal house fire turns suspicious two years on when it emerges the victim was visited by a stranger the night his home was destroyed. Will a plane ticket give a moment of proof?

Episode 4

S04 E04 • Thursday, Jun 19, 2025 • Jun 19 • 29m

Episode 5

S04 E05 • Friday, Jun 20, 2025 • Jun 20 • 28m

When a child goes missing, police have few leads. They have a suspect but not enough evidence to prove anything. Eventually, a torn-up cheque gives them their moment of proof.

Episode 6

S04 E06 • Monday, Jun 23, 2025 • Jun 23 • 28m

An organised crime gang supplying large quantities of drugs are almost impossible to uncover. But painstaking surveillance leads police to the kingpin, bringing down the operation.

Episode 7

S04 E07 • Tuesday, Jun 24, 2025 • Jun 24 • 28m

Two people die in an arson attack on their home, but police can’t get a DNA profile from matches left at the scene. Then, an eagle-eyed detective clocks a problem with the CCTV.

Episode 8

S04 E08 • Wednesday, Jun 25, 2025 • Jun 25 • 28m

When a missing woman is found dead, family and friends raise suspicions about her boyfriend. But police need hard evidence that he was involved. And they eventually get it.

Episode 9

S04 E09 • Thursday, Jun 26, 2025 • Jun 26 • 29m

Two men heading to a business meeting are kidnapped and forced to transfer a large amount of company money. Police unpick a web of calls and CCTV to find their moment of proof.

Episode 10

S04 E10 • Friday, Jun 27, 2025 • Jun 27 • 28m

Police suspect foul play after a meet-up goes wrong. But it takes toxicology tests to reveal the deadly cocktail that convicts a killer.

Episode 11

S04 E11 • Monday, Jun 30, 2025 • Jun 30 • 28m

Police are left confounded by a serial burglar’s Houdini-style disappearing act. But a single piece of information brings their game of hide-and-seek to a sudden end.

Episode 12

S04 E12 • Tuesday, Jul 1, 2025 • Jul 1 • 28m

Two young women are shot dead in Birmingham on New Year’s Eve. But it takes an audacious undercover mission for police to infiltrate rival gangs and find the moment of proof.

Episode 13

S04 E13 • Thursday, Jul 3, 2025 • Jul 3 • 28m

When the search for a missing woman becomes a murder investigation, a baseball cap and DNA on a discarded beer can help detectives find her killer.