Marshall pushed his boss (Martin Short) to fight harder for their cause. Robin and Kevin (Kal Penn) move from therapy to dating. Ted has a disastrous field trip experience with his class. Barney mistakes Nora for being too old for his tastes. All bad story lines, but none as bad as Lily's...

Robin tells a therapist how the blossoming Barney/Nora relationship drove her to assault a stranger as Ted inserts himself into Marshall and Lily's pregnancy.