Praygat

Praygat was a Tritivore who came along with his collegue Sorvin to trade with San Helios in return for dung to feed on. However their ship was grounded by an alien stingray and they were marooned on San Helios after it was destroyed. Sometime later they saw the number 200 bus arrive through a wormhole and brought the Doctor and Christina De Souza to their ship at gunpoint. They planned to kill them both as they assumed they were responsible for the attack on San Helios. However the Doctor soon proved them wrong and they soon gathered enough equipment to take the bus back through the wormhole. He then offered them passage to Earth, where they could hopefully find a home. Praygatt and Sorvin agreed but were both killed when one of the alien stingrays burst through the ceiling and devoured them.