On what date did BBC Two first broadcast the UK television show Dragon's Den?

BBC Two first broadcast the UK television show Dragon's Den on 4 January 2005.

The programme brought entrepreneurs into a room to pitch businesses to a panel of wealthy investors, known as the Dragons. Contestants sought investment in exchange for a percentage of their company, with the Dragons free to ask questions, negotiate, or decline.

The British series was adapted from the Japanese format Money Tigers, which had already inspired television versions in several countries. Its launch established a long-running BBC business-entertainment format rather than a one-off special.

The date is more specific than the often-quoted launch year of 2005. It is also distinct from the dates on which particular Dragons joined or left the panel, which changed repeatedly during the programme's run.