Dragons' Den originally aired on BBC Two before moving to BBC One.
The programme began as a BBC Two series, where its mix of entrepreneurship, negotiation and business storytelling built a substantial audience. Its move to BBC One reflected the show’s established popularity and placed later episodes on the BBC’s main general-entertainment channel.
The channel change is distinct from the programme’s production history. A change in BBC channel does not mean that the format itself changed from an investment programme into a different genre. The central structure remained entrepreneurs presenting businesses to a panel of potential investors.
A frequent mix-up is to name BBC Three or BBC Four because both are BBC television channels associated with specialist or factual programming. Dragons' Den’s original home was BBC Two, while BBC One became its later main broadcast outlet.