Walsh (The Zygon Invasion)

Colonel Walsh was a UNIT colonel and the leader of a strike team on a Zygon-infested building in Turkmezistan.

Biography
When the President of Earth arrived in Turkmezistan, Walsh ordered a missile strike on a Zygon-infested town, but their drone operator Lisa called off the strike on her own due to her seeing her husband and son in the town and unable to continue the strike. Instead, Walsh opted to lead a strike team on the building in Turkmezistan where the Zygons were hiding. (TV: The Zygon Invasion)