Air date: 2018-11-06

Runtime: 45 min

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.

Air date: 2018-11-13

Runtime: 45 min

The seven teams do battle in a drop test to see which model gets smashed up the best. They also build a memorable scene from history. Joining the judges is comedian Paddy McGuinness.

Air date: 2018-11-20

Runtime: 45 min

The teams compete to build a hybrid land and sea animal and a life-size crazy golf feature. Comedian Chris Ramsey tees off as this episode's celebrity guest judge.

Air date: 2018-11-27

Runtime: 45 min

It's the semi-final. The teams create a bust of comedian Johnny Vegas. Can they capture the essence of Johnny in plastic bricks? They also build a life-size arcade game.

Air date: 2018-12-04

Runtime: 45 min

The four teams build a walking-talking robo-pet. There is also a Master Build using as many as half a million bricks. But who will be crowned the winner for 2018? With guest judge Sue Perkins.