Carmen (Planet of the Dead)

Carmen was a middle aged woman. She was married to Lou.

Biography
Carmen was onboard the London Bus Number 200 with the Tenth Doctor and Lady Christina de Souza during Easter time. She was seen to be a quite caring person to the other passengers and towards the Doctor when she warned him to be careful after giving him a deadly prophecy. She also seemed to worry quite a bit during dangerous or unexpected situations.

Carmen had low-level psychic abilities. She was able to predict future events (every week, twice a week, she and Lou would win ten pounds on the lottery), sense what was going on without seeing it, and hear the voices of the dead on a planet. After the bus went through the wormhole to the planet San Helios, she warned the Doctor and the passengers that something was coming, riding on the wind, something that devoured.

After the Doctor saved her and they returned to Earth through the wormhole, Carmen offered him a prophecy: "...your song is ending, sir... it is returning through the dark... and ... oh, but then... he will knock four times." (DW: Planet of the Dead)