donna noble is a character in the british television series "doctor who". she is played by catherine tate. she is a secretary from chiswick, london. she is a companion of the tenth doctor. she appears in one scene at the end of the last episode of the 2006 series, "doomsday" (named in the credits only as "the bride"), and in the second christmas special, "the runaway bride". the character returned as the doctor's full-time companion for the whole of the fourth series in 2008.