Morvin was a fat humanoid from the planet Sto. He was married to Foon Van Hoff. He worked at the Milk Market and met Foon there. They were aboard the starliner Titanic when it was hit by asteroids. He befriended the Tenth Doctor and survived the asteroid crash with him. He later died when the metal of the platform he was standing on broke and he fell into the storm drive engine where he was incinerated.