In January 2000, two women became the first female Brits to reach the South Pole on foot. Adrian Chiles talks to them and their companions.

Back to the heady days of 1975, and the legendary boxing match between Muhammad Ali and Joe Frazier, told through the eyes of some of those who were there at the time.

We go back to 1996 and talk to those caught up in the bombing of Manchester City centre by the IRA.

We revisit the tragic events of 1980, when John Lennon was shot dead, by talking to those who were there that night.

The day Princess Diana walked across a minefield.

We go back to 1982 and talk to those involved in helping the only other country to leave the EU - and discuss comparisons with Brexit.

As the balls rolled for the first time, Adrian Chiles talks to some of those involved in the National Lottery launch in 1992 – including one of the first Lottery millionaires.

We go back to 1995 and talk to those involved in the sensational OJ Simpson trial - including the helicopter pilot who filmed the dramatic car chase.

We go back to 1995 and talk to those caught up in the collapse of Barings Bank, including Nick Leeson himself, the man whose £800m gamble went wrong.

We go back to 1985 and speak to the underwater investigators - including Robert Ballard himself - who stunned the world by finding the wreck of the Titanic.