On what date did the British television programme Dragons' Den first premiere?

The British television programme Dragons' Den first premiered on 4 January 2005.

The BBC launched the programme as a British adaptation of the Japanese business format Money Tigers. Entrepreneurs present business ideas to a panel of wealthy investors, known as dragons, and seek funding in exchange for an ownership stake.

The programme became part of the BBC's factual-entertainment lineup and helped popularise the televised business pitch in the United Kingdom. Its launch date is sometimes confused with the show's later moves between BBC channels, but the premiere itself was in January 2005.

Dragons' Den is also related to the international format Shark Tank, although the British programme and the American adaptation use different titles and investor panels.