Carmen was onboard the London Bus Number 200 with the Tenth Doctor and Lady Christina de Souza during Easter time. She was kind to the other passengers and towards the Doctor, whom she warned to be careful after giving him a deadly prophecy. She worried during dangerous or unexpected situations. After the Doctor had saved her and they had 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." (TV: Planet of the Dead)