The young LEGO building enthusiasts meet their celebrity leaders and compete in their first building challenge.
Each team has five hours to build a vehicle and their celebrity teammates' stunt double out of LEGO bricks; the teams send their brick-built stunt double and vehicles off the launchpad and complete an epic action movie stunt.
The remaining teams must build uncommon common rooms for the legendary Hogwarts Houses; the teams and celebrity companions create structures that reflect the world of Harry Potter encompassing secret passageways and whimsical house characteristics.
