The set of Dragon's Den

The set of Dragon's Den is in an abandoned warehouse in London. The presenters wandered in there after travelling to modern-day London from London in the 1700s. When they went in there, they met The Man with the Big Ears who Presents Dragon's Den, who allowed them to enter the Den.

The presenters entered the Den, where they were faced with the Dragons: Will tried to get them to invest in their Thing Longifier, but they refused to take him seriously because the product was so brown. Will offered them 0.3% of equity for £180,000, they refused but offered him a new band: Arcade Fire.
 * Peter Davies
 * Bannatyne Jones
 * Deborah

The Dragons eventually did invest, but the details of their investment were not revealed.