Dragon's Den originally broadcast on BBC Two in Britain.
The series launched in 2005 as part of BBC Two's factual and factual-entertainment programming. Its format combined business advice, negotiation and reality television, with entrepreneurs seeking money from investors in exchange for a percentage of their companies.
BBC Two is distinct from BBC One, the corporation's main general-interest channel. Although programmes can move channels or receive repeat broadcasts, the channel associated with Dragon's Den's original British launch was BBC Two.
The programme's channel history can cause confusion because other countries have broadcast their own versions on different networks. The answer refers specifically to the original British production, rather than an international adaptation or a later repeat.