The Tenth Doctor is accompanied by Donna Noble 's grandfather Wilfred Mott , played by Bernard Cribbins , on his final adventure in `` The End of Time '' .
He eventually parts ways with them all by the end of the 2008 series finale , `` Journey 's End '' , after which he attempts to travel alone for the duration of the 2008–2010 specials before being accompanied by Noble 's grandfather Mott ( Cribbins ) on his final adventure in The End of Time.