Brian Williams

Brian Williams was the father of Rory Williams, paternal grandfather of River Song, father-in-law of Amy Pond, and grandfather-in-law of the Doctor by way of his marriage to River.

Biography
He first met the Eleventh Doctor when the TARDIS materialised around him while he was attempting to help Rory and Amy change a light bulb at their house. He took Rory and Amy along with Queen Nefertiti and Riddell to investigate a ship that was headed straight to Earth and would reach it in six hours. Upon entering, they immediately found it contained dinosaurs. The Doctor didn't realise he'd materialised around Brian until after the TARDIS landed on the spaceship.

While looking at the main engines of the ship, the Doctor, Rory and Brian were taken to Solomon by his robots. Solomon had killed all the Silurians on this Silurian Ark and forced the Doctor to repair his legs so he could make off with the cargo. Discovering he had a few hours until the ISA launched missiles at the ship and unable to pilot the ark, Solomon took the most valuable thing on the ship identified by his IV system, Nefertiti. The Doctor magnetised the ark, trapping Solomon's ship that was inside. The Doctor released it once he put the signal of Silurian Ark inside Solomon's ship. The ISA missiles destroyed Solomon. Rory and Brian, who possessed the same gene chain, were able to pilot the ark to safety with the parallel pilot compartments. The Doctor returned everyone home, and gave Brian a sense of adventure when he saw the Earth from space. Brian began travelling around the world and sending homemade postcards back to his son and daughter-in-law. (DW: Dinosaurs on a Spaceship)