The British version of Dragon's Den first aired on BBC Two in 2005.
The programme is a British adaptation of the Japanese business reality format Money Tigers. It gives entrepreneurs a short presentation opportunity in front of wealthy investors, known as Dragons, who may offer money in exchange for an ownership stake in the business.
BBC Two was the BBC channel associated with the show's launch and its early run. The programme became one of the channel's best-known factual-entertainment formats, combining business advice, negotiation and high-pressure television. Its success helped establish a long-running franchise in Britain and inspired international adaptations.
A common mix-up is to answer BBC One because the show became widely known and attracted a large audience. BBC One is the BBC's main general-entertainment channel, but it was BBC Two that introduced the British Dragon's Den format to viewers. The programme's US adaptation is titled Shark Tank, while the British series retained the Dragon terminology from the original concept.