High Anxiety - S5-E6
Plot hole: In the beginning of the episode, Dawson is talking to his Doctor about seeing a Psychiatrist for his panic attacks. The Doctor mentions the name of one in Boston, and calls out to the assistant to make an appointment for Dawson. But only about 12 seconds (real time) later, the assistant suddenly comes in and already has made an appointment for Dawson the next day at 5PM. There is no way the assistant could have possibly gotten ahold of a busy Psychiatrist in Boston, and made a confirmed appointment for Dawson in only 12 seconds. It would take longer than that, especially as most Psychiatrists have phone menus where they have to return calls from. (00:01:25)
Answer: It's the same apartment Joey had in NYC. Comparing it to the beginning of the Finale; you can tell it's exactly the same location, furnishings, Plasma TV etc. Apparently Chris was only living with her at HER apartment, and now Pacey has taken his place at the end. I guess this implies Pacey successfully started his own restaurant business in NYC as he had dreamed, to be with Joey.