Wilfred "Wilf" Mott is a recurring fictional character in the British science fiction television series Doctor Who, played by Bernard Cribbins. He is the maternal grandfather of the Tenth Doctor's companion Donna Noble, and father of character Sylvia Noble. As companion to the Doctor, an alien Time Lord from the planet Gallifrey, Donna travelled through space and time in the show's 2008 series, having numerous adventures. A believer in extraterrestrial life himself, Wilf was proud of his granddaughter's adventures and helped to keep them a secret from her overbearing mother. Wilf later became the Tenth Doctor's final companion in The End of Time. Cribbins was originally intended to only appear in the 2007 Christmas special, "Voyage of the Damned", but when Howard Attfield was forced to retire from his role as Donna's father due to illness, creator Russell T Davies reconceived Cribbins' role as Donna's grandfather and replaced Attfield with him for the fourth series.