An accidental explosion in a Liverpool house ends up exposing a major drugs gang. And the theft of cash from an ATM leads detectives to a pair of serial fraudsters.

A suspicious financial transaction leads police to jail a prolific romance fraudster. And when a spate of break-ins prove to be linked, it ends with an alarming high speed chase.

A rookie officer who helps a drunk man get home suddenly finds himself on the front line of a murder investigation. And shoddy building work helps convict a serial fraudster.

What looks like a one-off break in turns out to be a long-term plot to steal regularly from an elderly woman. And a beat officer finds himself taking a murder confession.

What starts with a speeding car ends with police jailing a drink-driver who killed two innocent people. And a tip-off about an illegal gun exposes a vast haul of lethal weapons.

Neighborhood cops looking for a stolen motorbike find a huge stash of cocaine. And a threatening phone call leads police to a serial stalker who's been harassing dozens of women.

A 999 call about an intruder puts police on the trail of a violent attacker. And a traffic stop in Romania helps detectives solve a burglary crimewave much closer to home.

When an off-duty officer sees a small drug deal, it leads police to a huge cannabis farm. And a case of car clocking triggers a battle of wits between a cop and a serial crook.

A car that fails to stop for police turns out to be behind a life-threatening hit and run. And a single fake cheque puts officers on the trail of a gang of con artists.

A report of burglary turns out to be a sham - exposing a million pound fraudster. And when police stop a suspicious car, they end up bringing down an unscrupulous drug dealer.

A suspicious bag handover leads investigators to expose a major money laundering gang. And police called to a road accident soon realize they're dealing with a case of murder.

A seemingly accidental house fire leads detectives to snare a killer. And a van pulled over for having a cracked windscreen turns out to contain a massive cannabis stash.

A doorstep distraction burglary leads officers to a violent serial offender. And police cracking down on drug crime, uncover a huge fake ID factory serving criminals across the UK.

A burglary puts police on the trail of a luxury car theft gang and an international fugitive. And when a bank worker gets a strange message, investigators trace a major fraudster.

Police go to check on a missing man but end up hunting for a double murderer. And when officers finally catch up with a disqualified driver, he's in possession of Class A drugs.