Alex Thompson

Alex was a working-class human. We was the husband of Claire.

Biography
Claire was unable to have children. They took IVF treatment, to no avail. Eventually they had son and named him George. When George became frightened of something in the flat, it was placed in his bedroom cupboard. Alex could not cope with looking after him and began to wish someone would take George away. He had no job and could not keep up with his rent. In 2011, the Eleventh Doctor visited.

The Doctor explained George was an alien, but still his son. Alex's unconditional love for his boy allowed George to overcome his fears and save his father, the Doctor and Rory from the Peg Dolls. Subsequently, Alex lived a more peaceful life with his family. (DW: Night Terrors)

Behind the scenes
According to The Brilliant Book 2012, a book that contains non-narrative based information Alex's scripted last name was Thompson. However, there is no indication of any last name in Night Terrors as originally transmitted.