BBC Two originally launched the UK television programme Dragon's Den.
The programme debuted on BBC Two in 2005 as a factual-entertainment series built around entrepreneurs seeking investment. Its format combines business questions with the tension of a negotiation, making company valuation and equity understandable to a broad television audience.
BBC Two has historically been associated with factual, documentary and specialist programming, so the channel provided a natural home for a series focused on business proposals. The show later gained a much wider profile as its audience grew and its episodes became a regular part of the BBC schedule.
BBC Two is the original broadcaster, whereas BBC One is a different BBC television channel. The distinction matters because questions about the programme's first home refer to its launch channel, not every later scheduling change.