When Nathan Carman, a young man with a complicated past, is miraculously rescued from a lifeboat bobbing in the unforgiving North Atlantic, questions swirl about the fate of his mother, who is presumed to have drowned when their fishing boat sank. Nathan is in remarkably good shape for being lost at sea for a week, and his account of what exactly happened out there on the waves raises questions from family members and law enforcement.

On February 1, 1910, the vivacious, diamond-adorned music hall performer Belle Elmore suddenly vanished from her home, causing alarm among her friends, the entertainers of the Music Hall Ladies’ Guild. Their demands for an investigation would lead to the unearthing of a gruesome secret and trigger a fevered international manhunt for Belle’s husband, medical fraudster Dr. Hawley Harvey Crippen.

When Cindy Gambino dropped her three boys off at their dad's on Father’s Day 2005 she had no idea she would never see them again. By day’s end, their bodies lay at the bottom of an icy dam, a tragedy that sparked one of the most controversial and prolonged murder cases in Australian history. Award-winning author and journalist Megan Norris followed the case for eight years, chronicling Cindy’s heartbreaking journey through a trial, retrial, two failed appeals, and a 2013 High Court ruling that blocked Victorian father Robert Farquharson’s final bid for freedom.

October, 1997. Late one night in Fairbanks, Alaska, a passerby finds a teenager unconscious, collapsed on the edge of the road, beaten nearly beyond recognition. Two days later, he dies in the hospital. His name is John Gilbert Hartman and he's just turned 15 years old. The police quickly arrest four suspects, all under the age of 21 and of Alaska Native and American Indian descent. Police lineup witnesses, trials follow, and all four men receive lengthy prison terms. Case closed. But journalist Brian Patrick O'Donoghue can't put the story out of his mind.

Northern Ireland, 1975. Violence has erupted on the streets of Belfast. After years as a guerilla army, the IRA is clashing with Loyalist gangs and heavily armed British soldiers. But the Troubles have spilled beyond the island: An ocean away, in the heart of Philadelphia’s Irish enclave, a teenage girl finds a letter in her mailbox. Inside is a bullet, and the message is clear: The next one is for you or your family. As reporter Ali Watkins reveals, the conflict in Northern Ireland might have gone very differently had it not been for a small ragtag band of gunrunners in the United States.