Also, they're not allowed to bring books/games/writing utensils/anything to keep themselves occupied, pretty much. The only thing to do for 3 months is talk. About each other.

Mulder: Imagine if you could come back and take out five people who had caused you to suffer. Who would they be?
Scully: I only get five?
Mulder: I remembered your birthday this year, didn't I, Scully?

(The X-Files)