Travist Polong was a small, slug-like, multi-eyed alien. Though not evil, he was an repeated annoyance to Sarah Jane Smith.
Biography
In 2009 he attempted to put a plot into action at a hospital in Tarminster. Sarah Jane Smith showed up and he ran from her. She left to deal with a Berserker. (SJA: The Mark of the Berserker)
Later that same year, he was being sold on eBay. Sarah Jane bought him to keep him out of trouble. On arrival at Sarah Jane's house, Rani Chandra and Clyde Langer took him inside Rani's house and were attacked by Polong, who chased them to 13 Bannerman Road, where he was held back by K9. Sarah Jane ordered Mr Smith to teleport him to Polongus, which he did. (SJA: The Wedding of Sarah Jane Smith)