It's Finals Week - Chateau Impney in Worcestershire, set in acres of stunning landscaped grounds, is the setting for MKR Headquarters. In the first challenge, to mark the 20th anniversary of the first Harry Potter novel, the eight teams must cook a magical outdoor feast over an open fire for a hoard of hungry fans and quidditch players to be scored by the guests and by the judges, Glynn and Rachel. The two lowest scoring teams will be eliminated and the two winning teams - the People's Choice and Judge's Choice - will gain immunity and go straight through to the Semi Finals. The remaining four teams will cook off against each other.