Brian Williams

Brian Williams was the father of Rory Williams, the father-in-law of Amy Pond, and paternal grandfather of River Song. When River married the Eleventh Doctor, he became his grandfather-in-law.

Biography
Brian and the rest of Amy and Rory's families and friends were under the belief that the couple honeymooned in Thailand (TV: Dinosaurs on a Spaceship) when in fact they travelled through space and time aboard the TARDIS (TV: The Big Bang, TV: A Good Man Goes to War) and honeymooned on an interstellar cruise ship (TV: A Christmas Carol) and on a planet which was on a honeymoon with an asteroid. (TV: Death of the Doctor)

Brian first met the Eleventh Doctor when the TARDIS materialised around him while he was attempting to help Rory and Amy change a ceiling light bulb at their house. The Doctor had taken Rory and Amy along with Queen Nefertiti of Egypt and John Riddell to 2367 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 did not realise that the TARDIS had materialised around Brian and had taken the latter aboard 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. Among the postcards was one from the planet Siluria to which he had travelled with the Doctor and the dinosaurs aboard the Silurian Ark. (TV: Dinosaurs on a Spaceship)

Brian lived in London, in reasonably close proximity to his son and daughter-in-law's home. After assisting his family and the Doctor with the "slow invasion," the Doctor invited Brian back to travel again in the TARDIS with his family, but Brian declined. He offered that someone had to tend to Amy & Rory's plants. (TV: The Power of Three)

Personality
According to Rory, Brian disliked travelling to other places; however, following his adventure aboard the Silurian Ark he began travelling quite often and shared his travels through postcards with his son and daughter-in-law.

Brian loved his son, Rory, but didn't seem to have very much faith in him until their adventure with the Doctor. He liked his daughter-in-law Amy and noted that Rory was a lucky man. During the adventure, Brian bonded with Rory and realised that Amy was as lucky to have him as Rory was to have her. Brian was more confused than frightened when the Doctor took them to a spaceship full of dinosaurs, unable to fully believe that it was really happening. Although he did not fully understand what was going on, Brian did show that he was capable of picking up small details, telling the Doctor that he and Rory could pilot the ship after hearing the Doctor mention something about a gene chain. He also displayed delight about getting the chance to pilot a spaceship, finally opening his mind to the fact that what he was experiencing was really happening and not in his imagination. (TV: Dinosaurs on a Spaceship)

When the Doctor returned to Earth, Brian seemed comfortable in his presence and devoted himself to keeping an eye on the mysterious cubes at the Doctor's request. He displayed some concern about what happened to the Doctor's companions if they stayed with him for too long, but despite this he encouraged Amy and Rory to continue their travels with the Time Lord. (TV: The Power of Three)