8x02 Every Silver Lining...
1x15 The One with the Stoned Guy [goodness-knows-what-th watch]
It strikes me how often Friends episodes don't name themselves after the most memorable element. This one, for example, is The One Where Ross Talks Dirty, or The One with the WENUS.
The Last Leg
3x06 (4/9/13 edition)
[Watch it (again) on 4oD.]