Psych S08E01 - Lock, Stock, Some Smoking Barrels and Burton Guster's Goblet of Fire
Summary:
Shawn and Gus recount their adventure in London through a "Guy Ritchie" style Voiceover. We learn that Gus is in London for a Harry Potter convention called "Pottercon" and that Shawn has been summoned by Interpol to help on an undercover sting.