Episode 4. When September Comes: Part 2.

Taylor and Simon host the biggest party in Blue River. Grace takes down a member of Blue River's animal kingdom. Taylor makes a speech that doesn't land well. Andy tells Taylor how he really feels. Charlie tells Stewart he's in trouble.

Taylor and Ellie Mae attend a high school dance in Evergreen. Brett Hansen comes back into the picture. Simon spends the afternoon with Amy. Taylor and Andy attend an unorthodox meditation class.

Taylor and Andy attend the Fabio concert. Stewart and Charlie go fishing. Ellie May breaks into Blue River Caring Day. The hammer comes down in Dr. Tim Orwell.

Valentina's family return from their road trip. Taylor starts to challenge Blue River politics. Simon finds the courage to talk to Amy. Stewart's boss initiates a hard conversation. Grace is prescribed an intense pharmaceutical cocktail. Valentina returns to Italy.

Debaters argue the benefits of school resource officers. The Fallow women visit New York City for the weekend while the men stay home and build Pine Wood Derby cars.

Grace asks the girls to resist peer pressure at a high school party. Stewart has an awkward conversation with his doctors. A cat dissection goes very wrong. We learn the basics of PTSD.

Staff and students return to Blue River High School for the first time, which is being overrun by therapists. We meet Dr. Tim Orwell. The town comes together for a memorial. The Fallow family grows by one member.

*TRIGGER WARNING - if you are a school shooting survivor, please consider skipping this episode. The hostage situation at Blue River High School comes to a close. Stewarts returns to where the crisis began.

Flirtation builds between foreign exchange student Valentina and her classmate Grant. A dangerous stranger appears in classroom 210.

Things heat up between Taylor and her life guard boyfriend at the local swimming pool. News breaks that the famous Fabio is coming to Denver. Stewart breaks new ground with Dr. Patel at the state hospital.