Walter Douglas

 was a major in the Prince of Wales' Own Regiment of Yorkshire. He was called in to assist Colonel Lethbridge-Stewart in the clear up after the London Event.

Dougie, as Lethbridge-Stewart called him, had been best friends with Lethbridge-Stewart since Sandhurst and was one of the "holy trinity" of cadets alongside Leslie Johnston. Douglas had not planned on a military career, he had expected to be a market stall holder on Portobello Road.

He introduced Sally Wright to Lethbridge-Stewart, and was to be best man at their wedding.

After the clear up of the London Event, Douglas was promoted to lieutenant colonel. (PROSE: The Forgotten Son)

He was called in by Major General Hamilton to assist journalist Larry Greene in finding Lethbridge-Stewart, after the colonel failed to reach Tibet. (PROSE: The Schizoid Earth)