The three teams in the second semi-final are challenged to build a track based on a blockbuster movie in just three days. The Railmen of Kent recreate the wizarding world of Harry Potter, complete with broomsticks, giant spiders and enchanted cars. Wild card entry Muddle and Go Nowhere base their track on James Bond, while Who's Counting Rivets pay homage to Jurassic Park with a dinosaur-infested creation.