Bau

Bau Chan was a Chinese resident of London and the husband of Ru Chan. He accompanied Ru to Jackie Tyler's alien party. He looked through a window at the argument going on between Jackie, Rose Tyler and Mickey Smith. Mickey was trying to keep Rose's time travelling a secret, so when asking her to blab it out to Jackie, he shut the door - and the window - on Bau. (DW: Aliens of London, REF: Doctor Who: The Encyclopedia)