Travast Polong
From Tardis Wiki, the free Doctor Who reference
Travist Polong was an orange, metre-long, three-eyed slug/slater-like alien that attempted to put plot into action at an hospital in Ealing. Sarah Jane Smithshowed up and he ran from her. She left to deal with a Berserker. (SJA: The Mark of the Berserker)
It is unknown what happened to Polong