The teams compete to construct a skyscraper and a metre-long bridge that will withstand a weighted dumper truck . This episode's guest is comedian Rob Beckett.

Melvin Odoom welcomes the six remaining teams back to the Build Room. Their first challenge is to build a land and sea animal hybrid. Which team will create the wackiest creature? The teams' next challenge is the biggest yet. So big, in fact, the teams have to head off to a real life golf course to demonstrate their life-size crazy golf holes - complete with putter. Comedian and Lego superfan Chris Ramsey tees off as this episode's celebrity guest judge, joining regulars Matthew Ashton and Fran Scott to decide which teams will make it through to the semi finals.