Hardtalk is a BBC television and radio programme, consisting of in-depth 25-minute one-on-one interviews. It is broadcast four days a week on BBC World News and the BBC News channel. Launched on 31 March 1997, much of its worldwide fame is due to its global reach via BBC World. Until early 2005, the host was Tim Sebastian, whose sometimes controversial style of tough questioning brought a huge world audience to the show. It is normally broadcast late at night on the BBC News Channel. Until the mid-2000s, it was broadcast at around 11:30 pm, but in more recent times it has been broadcast an hour later at 12:30 am. In 2015 it was moved to an earlier slot 20:30 in the evening as part of a changes to the channel. Since 2017, that has been reversed, and UK viewers may only view the programme online or overnight at 00:30, 02:30 and 04:30, with no repeat shown during the day or on weekends.