The British television programme Dragon's Den first began broadcasting in 2005.
The opening series established the programme's central format: entrepreneurs enter a studio, explain their business plans and request investment from a panel of experienced businesspeople. The Dragons can make offers, negotiate among themselves or reject a proposal outright.
The British edition was adapted from the Japanese programme Money Tigers. Its first broadcast brought a business-pitch format to a mainstream UK audience and helped make phrases such as “walking away” familiar in popular culture. The series has continued through many changes in its investor panel and presenting team.
The year is sometimes confused with the debut dates of overseas adaptations. Dragon's Den has been produced in several countries, while the British edition specifically began in 2005. That date refers to the first UK broadcast, not the creation of the original Japanese concept.