S2 E1 Murder in the Woods When the mother of 13-year-old Lucy reports her daughter missing, police and forensic investigators begin the painstaking search to uncover the truth of what happened to the teenager.

S6 E5 Don Miller A terrifying murderer known as 'The East Lansing Serial Killer' snatched away the lives of four people in Michigan before being caught while trying to claim his fifth victim in 1978.

S6 E2 Connor Lyons When the body of teenager Connor Lyons is found in the River Hull, police investigators begin to have suspicions that his death might be connected to the sale of a bike on social media.

S1 E1 Modern Family Murder While investigating the murder of a devoutly religious couple, police investigators uncover dark secrets about the family, leading them to a shocking suspect that no one could have considered.

S3 E13 The Skull Crusher Police in Hartford, Connecticut, investigate a string of ruthless killings in the Asylum Hill area committed by a killer with a devastating mark that leaves his victims nearly unrecognisable.

S2 E1 Mick Philpott An examination of Mick Philpott, the notorious Derby father of 17 who murdered six of his children, one of whom died in hospital, when he set the family home on fire in 2012 while they were asleep.

S4 E3 Motorbike Thefts The city of London crime squad have their work cut out for them when a gang of suspected motorbike thieves try to flee from them, and there is trouble on the Underground that the police must attend to.

S18 E10 A passenger hopes for a smash hit for her rap, GPS distraction causes a crash, and police discover fake rego labels made with sticky tape.

S19 E1 A closer look at New Zealand cops as they deal with the challenges of monitoring the nation's busiest motorway.

S7 E1 Missing Driver Mystery A taxi driver runs a red light, inadvertently setting off a bizarre chain of events. A driver caught using his phone while driving mounts a vehement defence.

S7 E2 You Can Run Officers track a car that travelling at outrageous speeds with no sign of slowing down; police are thrown when a driver claims he is a UFO.

S2 E14 While an American's trip to Alaska heads south, officers suspect a convicted drug dealer is taking his business north. A ship containing weapons is also searched.

S2 E15 Officers stop a father and son packing loads of ammo, but can't find the gun. Meanwhile, the Vessel Search Unit find a suspect sailor on a US tug.

S4 E7 Staff encounter a traveller with a questionable past, contraband appears in the mail facility, officers inspect passengers at JFK, and a fugitive shows up.

S4 E8 An inside smuggling job is revealed at JFK; a wrong turn separates friends; German tourists in Washington; a baggage exam in Detroit.

S10 E16 Follow Australian Customs and Border Protection officers as they attempt to enforce the country's various quarantine, customs, immigration and finance laws.

S10 E17 A relentless officer has a run-in with an unsuspecting passenger. Meanwhile, quarantine find an animal's head in the mail.

S1 E5 One passenger appears to be carrying a handgun in their suitcase, and another passenger's bag gets swabbed and tests positive for traces of drugs.

S3 E8 Counts down some of the most incredible, spectacular and hilarious real life crashes in the world. Video cameras capture massive pile ups, road rage and misguided overtaking manoeuvres.

S1 E2 Nadine Aburas When a woman is found dead in a hotel, police investigators realise that an apparent suicide is not what it seems to be, leading to an extensive search for a killer that crosses borders.

S2 E1 Lord Lucan: The Missing Earl Fred Dinenage looks back over the life of Lord Lucan, the aristocratic figure whose glamorous life became tainted by gambling losses, murder, and mistaken identity before he vanished in 1974.

S7 E2 Diane Chenery-Wickens In 2008, the quiet village of Duddleswell found itself rocked when a dog walker discovered the body of missing television make-up artist Diane Chenery-Wickens, setting off a police investigation to unmask the murderer.

S2 E10 Pawel Tuchlin: The Scorpion An examination of the Polish serial killer 'The Scorpion' who targeted women in a devastating spree of violence, murdering nine and attacking 11 others before being arrested in 1983.

S2 E2 Mark Bridger In 2012, April Jones disappeared from outside her home in Wales, never to be seen again. Her abductor and murderer was found to be Mark Bridger, who was sentenced to life imprisonment.

S2 E6 The Principle Suspect A seemingly ordinary family man becomes the prime suspect for police investigators when his wife, three young children, and mother-in-law are discovered brutally killed after attending church.

S1 E2 Nadine Aburas When a woman is found dead in a hotel, police investigators realise that an apparent suicide is not what it seems to be, leading to an extensive search for a killer that crosses borders.

S3 E1 Ted Bundy Serial killer, kidnapper, rapist, and burglar Ted Bundy confessed to committing 30 horrific murders in seven states between 1974 and 1978, but the true number of his victims is unknown.

S6 E5 Lee Ford In a tiny hamlet in Cornwall in October 2000, police found the bodies of Lesley Ford and her four children, a chilling discovery that would leave officers and the whole nation shocked.

S6 E3 David Twigg After David Twigg is locked in the storeroom of a burning building, the race is on to identify those who started the blaze, but the police soon uncover evidence of a killer much closer to home.