In Dorset, Melinda and Dom meet a grandmother who entrusted a builder with creating an attic conversion where she could recover in peace from a gruelling course of chemotherapy. However, four months later he walked off the job, leaving the family's home, and their lives, in tatters.

This week Dom and Melinda come to the aid of a couple in north-west London, who need to complete a loft conversion and a downstairs extension to give them the space to move their sick grandfather into the family home.

The cowboy builder featured in this episode is called John Guerin. The limited companies he trades as, or has formerly traded as, include:

Bluewood Constructions Ltd

Greyfox Project Management Ltd

St Malory Projects Ltd

Wynchwood Design & Development Ltd

Blue Ferne Construction Ltd

Merlyn Refurbishment Litd

De Guerin Contruction & Design Ltd

Melinda and Dom come to the rescue of single mother Pam from Camberley, Surrey. Pam was forced to give up the pursuit of her dream job when a cowboy's actions left her on the brink of financial ruin and living in a structurally unsound home.

In Lewisham, south London, Dom and Melinda meet couple Cathy and Stuart and their two young children. The family's beautiful Victorian terraced home was left structurally unsound after a cowboy builder refused to finish the job and escaped with their life savings.

Dom returns to Cardiff to have another crack at catching a cowboy who last time slipped through his grasp. He also revisits the homeowners whose house was damaged by the rogue. Julia and her family were left without heating for three years. How much have their lives changed since Dom and Mel helped them out?

The Cowboy Builders featured in the update show have traded under the following business names:

- David Goymer of Pevensey bay, East Sussex has traded as Bay Building Limited

- Tony McMahon of Aylesbury, Buckinghamshire has traded as Phoenix Building Services (Bucks) Limited and Black Cat Construction (MK) Limited

- Neil Smart based in Cardiff has traded as Axbridge Design Ltd

These builders are not related to any other companies with similar names elsewhere in the UK.