The nine baking pairs create a piece that shows their love for Harry Potter.

The teams are in Gringotts Wizarding Bank, where James and Oliver Phelps ask the bakers to create 3-foot showpieces inspired by the bank's main hall, tunnels and vaults.

In a salute to the famed shops of Diagon Alley, hosts James and Oliver Phelps challenge the bakers to make 50 handheld desserts to feed a crowd of Harry Potter fans, who vote on a winner; judges Carla Hall and Jozef Youssef decide which team must go.

James and Oliver Phelps host as pairs of professional bakers create edible showpieces on the actual Harry Potter film sets; guest actors from the films share behind the scenes experiences as they join judges Carla Hall and Jozef Youssef.

James and Oliver Phelps ask bakers to create a four-foot-tall showpiece inspired by Albus Dumbledore's office items; Harry Potter alumna Bonnie Wright joins judges Carla Hall and Jozef Youssef to decide which teams advance to the final showdown.

Creating a showpiece that reaches at least 6 feet tall and commemorates at least one event that takes place in the Great Hall; the bakers must also include two culinary effects and incorporate at least two tasting elements; surprise guests arrive.