On a scratchy recording made in a Melbourne hotel room above a casino, a man admits to committing murder. But as journalist Alicia Bridges investigates the man on the tape known as Mr Big, she finds herself in a world of lies and subterfuge, where very few things are as they seem. The recording leads her deep inside an international controversy, to a world of secrets that powerful institutions don't want revealed.Mr Big is the latest season of Unravel, the ABC's award-winning true crime podcast.Previous seasons of Unravel have covered everything from love scams to neo-nazi gangs.'Snowball' (Season 4) won Best True Crime at the Australian Podcast Awards in 2020, was one of Apple Podcasts' Best Listens of 2019, made the American Bello Collective's top 100 list that year.'Blood on the Tracks' (Season 1) won a Walkley award for Coverage of Indigenous Affairs.In Season 5, Firebomb, Crispian Chan investigates what really happened after his family's restaurant went up in flames in 1988. He was just a kid when Chinese restaurants were being firebombed in the dead of night and a campaign of terror was underway in Perth. Thirty-five years on, most of us have never heard about it, even though it's one of the few sustained and coordinated terrorism campaigns in Australia's history. Crispian teamed up with ABC reporter Alex Mann, and together they traversed the country to find answers and explore the darker forces that still lurk in our suburbs today.In Season 4, Snowball, Ollie Wards investigates how his brother's whirlwind romance with a charismatic Californian woman ultimately cost his family more than a million dollars. When Greg Wards met Lezlie Manukian, a beautiful woman whose world is full of glamour, he is immediately drawn to her. They fall in love, get married and start planning the rest of their lives together — the only catch is Lezlie is a con artist. To find out who his brother's wife really is, Ollie must track down Lezlie herself, and it soon becomes clear that his family's story is just one piece of a bigger jigsaw.In Season 3, Last Seen Katoomba, reporter Gina McKeon digs deep into the suspicious unsolved disappearance of young mum, Belinda Peisley, who was last seen in the Blue Mountains town of Katoomba, west of Sydney, in September 1998. Belinda's life descends into chaos after her 18th birthday when she receives a large inheritance and buys her own place in town. It's a move her family thinks will set her up for life but, instead, the house becomes a magnet for a world of drugs and a crowd of hangers-on who visit day and night. Gina pieces together the stories and evidence around the six main persons of interest named in the inquest into Belinda's disappearance and suspected death, and what emerges is a picture of a town and a case shrouded in secrecy.In Season 2, Barrenjoey Road, reporter Ruby Jones tries to solve the mystery of what happened to 18-year-old Trudie Adams after she disappears while hitchhiking home on Sydney's northern beaches in 1978. Ruby exposes the dark underbelly of the seemingly beautiful and serene "Insular Peninsula," uncovering a world where surfers run drugs home from Bali, gangs of men prowl the beaches and predators have unchecked power. Ruby will question why the case was never solved and her investigation will lead her to a criminal monster with links to organised crime and police corruption at the highest level.In Season 1, Blood On The Tracks, award-winning Muruwari and Gomeroi journalist Allan Clarke spends five years investigating the unusual circumstances surrounding the death of 17-year-old Gomeroi teenager, Mark Haines. In 1988, just outside of Tamworth in country New South Wales, a freight train hits Mark's body lying across the tracks. When the rail worker stops the train and gets out, the scene doesn't add up. The tracks divide Tamworth in two. An Aboriginal community on one side, a largely white population on the other. Some will say it was a suicide and others a murder. Despite the strange evidence found at the scene of his death, the family feel like they're being ignored by police. An inquiry finds no answers and the mystery is left to fester, causing division and suspicion in the town. Allan's reporting helps to spark a resurgence of interest in the case that sees the file reopened, a review launched, a reward announced. As Allan gets closer to the truth, the story ends with a revelation no-one was expecting, and the thirty-year-old mystery finally begins to unravel.