"Doomsday" is an episode in the British science fiction television series Doctor Who. It was first broadcast on 8 July 2006 and is the second part of a two-part story. The first part, "Army of Ghosts", was broadcast on 1 July. The finale of the 2006 series, it is the final appearance of Billie Piper as companion Rose Tyler. The characters Pete Tyler, Jackie Tyler, Mickey Smith and Jake Simmonds also depart the series in this episode. It features the return of the Daleks, who had not been seen since the 2005 series' finale, and the Cybermen, who appeared earlier in the series.