Geoff Noble
Geoffrey "Geoff" Noble was Donna Noble's father and Sylvia Noble's husband. He was walking his daughter down the aisle, during her wedding to Lance Bennett, when she unexpectedly disappeared in a burst of golden light. As baffled as anyone else, Geoff took charge of seeing to the injured in the wake of the Robot Santas' attack on the wedding reception, and was overjoyed when Donna returned safely home after her adventure with the Doctor. (DW: The Runaway Bride)
As Sylvia told her daughter, in May 2009, that she has had a tough year "with your Dad", Geoff died on 15th May 2008. (NSA: Beautiful Chaos)
Sometime before his death he met the Tenth Doctor and gave him a pound, which the Doctor used to buy a lottery ticket, which contained the winning numbers on the triple roll-over on his daughter's wedding two years after his death. His helping the Doctor like that inadvertantly helped the Doctor save Donna, Sylvia and Wilfred from the financial trouble they were in and secured their future. Sylvia was also shocked but touched by his and the Doctor's actions to help them out. (DW: The End of Time)
Behind the Scenes
Howard Attfield was due to reprise his role as Geoff Noble in Series 4, but he died in November 2007. His scenes were refilmed with Bernard Cribbins playing the character of Wilfred Mott, who had already been filmed for the Christmas special, Voyage of the Damned, and was subsequently changed to be Donna's grandfather.