Senate room

In an alternate timeline, the senate room was located in the Buckingham Senate. Whilst the Eleventh Doctor, as soothsayer explained to Winston Churchill what had happened to time, the pair found that they had moved to the senate room. The Doctor soon realised that they had been encountering a group of memory-proof Silents. At that point, Amy Pond and her forces stormed in and contained the Silents before retrieving the Doctor, whom Amy rendered unconscious with a stun gun. (TV: The Wedding of River Song)