Hath Peck

Peck was a Hath who fought in the war against the humans on Messaline.

Peck was caught in a blast detonated by Jenny, which dislocated his shoulder. His comrades kidnapped Martha Jones, who put his shoulder back in place, so just as the Hath were about to kill her, he stopped them. The Hath discovered that there were secret tunnels in their base, so were forced to raid them to win the war.

Martha found a passageway to the top of the planet and went there with Peck. He was afraid to go up, having heard stories about the dangers of the surface, but was quickly convinced. As they were walking, Martha accidentally fell into a swamp, but Peck saved her by jumping into the muck and pushing her to safety. He was then submerged and subsequently drowned; his death deeply affecting Martha. (TV: The Doctor's Daughter)