Ben, Leslie and Chris go to San Francisco for a National Parks conference; Tom opens his restaurant; Leslie is faced with a decision.
When a Nor'easter hits the Hamptons, Hank saves the life of a park ranger who wants to recapture the odd side-effects he experienced after being struck by lightning.
Hank treats a woman suffering from hallucinations, Divya and Raj fret over their engagement party, and Charlie moves back in with Jill, making her question her feelings for Hank.
