Rotmund

Captain Rotmund was a German army officer in World War I. While pursuing British soldiers in Belgium, his men captured the Tenth Doctor and Rose Tyler, then came across a Warfreek surveillance device. They tried unsuccessfully to attack it, but the noise attracted the sound of British soldiers and fighting broke out. The Doctor used his sonic screwdriver to stop the fighting by giving Rose the appearance of an angel, which frightened the soldiers away, then used it to force the Warfreekz to withdraw. The Doctor warned Captain Rotmund that the angel would return unless two of his soldiers received commendations. (DWAM: Warfreekz!)