Malcolm Wainwright

From Tardis Wiki, the free Doctor Who reference

Malcolm Wainwright is grandson of Kathy Nightingale and Ben Wainwright. He delivered a letter from his dead grandmother, Kathy, who a second ago had been by Sally Sparrow. His great-uncle is Larry Nightingale, who was Kathy's brother. Later on, Sally walks off with Larry, which could suggest that one day Sally will be related to Malcolm. (DW: Blink)