S4, E103: Returning fan-favorites from past LEGO Masters seasons—David Guedes, Caleb Schilling, Krystle Starr and Randal Wilson—and celebrities—NeNe Leaks, Marshawn Lynch, Kelly Osbourne and Rob Riggle—pair together to compete in holiday-themed challenges to win $10,000 for the charity of their choice. In the first challenge, the duos must create a festive train that is strong enough to crash through 35 candy canes. The team who builds a train that crashes through the most candy canes is automatically placed in the top two. The team that builds an equally strong and aesthetic train wins money. In the next challenge, the teams come up with an idea for an original holiday movie and build a detailed scene from their story. The team that builds a captivating scene and pitches their movie idea most effectively wins money for their charity of choice.