Welsh child actors Deepal Parmar, Craig Roberts and Sophie Borja were cast as siblings Chantal, Rio and Roxy Wellard respectively and Felix Drake took on the role of Wolfie.

[5] After the events of The Movie of Me, Tracy's now living with Cam, and just around the corner at the new location of the Dumping Ground (from Stowey House to Cliffside) is the arrival of the Wellards, every care workers worst nightmare, consisting of Rio, Chantal and their younger and superior sister Roxy.

Meanwhile, Elaine has been pulling out all the stops to find a perfect foster family for Marco, so the other kids plan to turn him into a "normal" boy.

Rio later feels guilty for this as he genuinely enjoys Crash's company, although Chantal and Roxy have no qualms about freaking Marco out about it.

The DG kids visit Carters Woods for Jackie and Bouncers last day, meeting Tracy and Cam along the way.

But as they are led on a secret trail, it soon becomes clear that they have been set up by Sid and Duke, and Tracy and Cam receive a spectacular surprise.

Holly Lyons, Marvin Close, Ariane Sherine and Abigal Abben-Mensah did not return to write for series 4.

Returning from writing the previous three series are Morris, Laura Summers, Othniel Smith and Andy Walker.