Upon first meeting the Doctor, he was awe-struck and saluted him, but as the operation went on he became more irritated by the Doctor's cavalier approach and dismissal of the military's tactics. When the Sontarans revealed themselves, he clashed with the Doctor when UNIT tried to launch a nuclear strike on the Sontaran warship, and was later forced by the Doctor to call a full retreat from the ATMOS factory when the Sontarans began slaughtering the soldiers present.