Dragons' Den originally launched on BBC Two in 2005.
The British programme premiered on BBC Two on 4 January 2005. The channel was the BBC's long-established home for factual, documentary and specialist programming, making it a natural place for a business-investment format built around entrepreneurs and commercial negotiations.
The show's popularity later made it one of the BBC's most recognisable factual entertainment properties. Its audience sees entrepreneurs request investment, disclose a valuation and negotiate directly with wealthy businesspeople. The format can look like a conventional game or talent show, but its subject is business ownership and equity.
BBC One is the most common mistaken answer because it is the BBC's flagship general-entertainment channel. However, the launch channel was BBC Two. The programme's first broadcast date and original channel are separate facts: it began on BBC Two in 2005, not on BBC One.