Heather attends an office party and wakes up with an unexplained hickey; Jen becomes friends with Dave Grohl; Sarah receives a mysterious package at the office.

Josh bets Jay Leno over the game at Ross' football party. Chelsea is the only one that enjoys her assistant's character with a lisp. Jiffy meets with Jane Fonda to discuss her coming on the show. Chelsea introduces the group to Jennifer Aniston, who has more to say behind Chelsea's back than expected.