Greg Wise and Judi Love competed in the dance off after and the deciding vote was with the judges.
Revel Horwood said the actor looked like he was recovering from hip surgery, while Anton Du Beke said it was uncomfortable to watch.
Thompson has been spotted watching Wise on the show.
The actor was just about good enough to take on the serious contenders of the main show, but the Love Island star struggled with her biscuits.