Two days have passed since the last season finale Existence (2001), but the hair of both Scully and Reyes is significantly longer.
Alvin Kersh refers to George III as "the King of England". The title of George III was King of Great Britain and Ireland. While England is the largest section of Britain, the title King/Queen of England has not existed since 1707, 31 years before George was born. However, it is common for people from countries which were never part of the British Empire, or which severed all ties with Britain before living memory (as is the case with the USA), to refer to England and Britain interchangeably.
The figure in the shower at Scully's apartment in the beginning of the episode (supposedly Mulder) is wearing dark shorts.
(19m40s) Reyes is talking to Brad Follmer.
Her face can be seen in the fore-ground, out of focus.
But when she starts saying "not to mention that how excited I was to be in D.C." her lips don't move.