Every year seven and a half thousand unregistered and illegal gas engineers install a quarter of a million appliances in homes all over the UK, putting lives at risk. Mark Clemmit and the team go undercover to expose and confront a serial offender who has been carrying out illegal gas work for years.

A new generation of poison-resistant rats are emerging in Britain who pose a threat to us all. They damage our homes, start electrical fires and carry dangerous diseases. Angellica Bell joins pest control as they hunt high and low to try and solve the mystery of how rats are getting into a young family's home in Swindon.

A homeowner in East London gets a shock as we tackle one of the biggest causes of serious injury in our homes. Show less