The British television show Dragons' Den first premiered on BBC Two in 2005.
The BBC launched the UK version after adapting a Japanese business-pitch format. Its early home on BBC Two helped establish the programme as a factual-entertainment series in which entrepreneurs presented their companies to potential investors.
The show later became prominent enough to move to BBC One, but that later broadcasting history does not change its original channel. This is a common point of confusion because many viewers encountered the programme after it had gained a larger mainstream audience.
The channel distinction matters in the show's broadcast history: BBC Two was the original outlet, while BBC One became its later national home. The programme has remained a BBC production rather than a commercial-channel series.