Exposed: What became of baby Tegan Lane?

Pick of the day: Exposed: The Case of Keli Lane, 8.30pm, ABC.

Elise Worthington and Caro Meldrum-Hanna in Exposed: The Case of Keli Lane.

Pick of the day: Exposed: The Case of Keli Lane, 8.30pm, ABC.

This eminently watchable three-part true-crime series makes its debut tonight. In The Case of Keli Lane, the ABC’s Caro Meldrum-Hanna and Elise Worthington investigate the disappearance of two-day-old Tegan Lane in 1996 and the conviction of mother Keli Lane in 2010 for her murder.

During the trial, the prosecution argued a circumstantial case that Keli Lane killed Tegan because a child would interfere with her goal to play water polo for Australia at the 2000 Olympic Games. But Lane has always maintained her innocence, sticking to her story that, after concealing her pregnancy, she had given Tegan to the baby’s father, Andrew Norris, a man who never has been found.

But, as she admits in the opening dialogue during one of many six-minute phone calls with Meldrum-Hanna from jail, she also has told a lot of lies.

Meldrum-Hanna and Worthington set out to test Lane’s claims and explore the mystery of Tegan’s disappearance, revisiting people in Lane’s life and tracking down ones with new information.

As happens, audiences will weigh everyone’s agendas, responsibilities and honesty, including journalists who venture into the foreground. It must be said that few, if any, of these true-crime series have materially changed the course of justice. But as gripping entertainment: top notch.

The case unravels in Exposed: The Case of Keli Lane, on ABC tonight.

Also tonight, on SBS’s The Feed, audiences will be treated to an investigation of Japan’s virginity crisis. In a country with a rapidly ageing population, where it is said that sales of adult nappies surpass baby ones, this documentary from Marc Fennell says the number of virgins among young and unmarried Japanese is reaching a crisis point. In the course of this analysis, Fennell attends a group dating event and meets a Japanese sex therapist, young salarymen out on the town and the mother of a young woman who took her own life after being overworked by her company.