As Sam gets political with his art, Elsa and Doug explore a (not-so-normal) weekend away. Casey and Izzie re-examine their relationship.

A hard truth keeps Casey up at night. Sam experiences a rough season with Zahid — and Paige. Elsa and Doug brace for their next chapter.

While Sam and Casey face friendship dilemmas, Elsa uncovers a charming surprise, and Doug makes an unexpected decision.

Sam’s art assignment inspires an impromptu field trip. Casey navigates a fight with Izzie. Evan works hard for a second chance with Doug.

As Paige makes a plan in the face of adversity, Sam awaits a crucial academic update. Elsa endures an uncomfortable encounter.

Casey and Evan take to the open road for a tense reunion. Back home, Sam and Zahid get ready to party, and Elsa bids farewell to the past.

An ethics professor pushes Sam to his limits. Elsa keeps an eye on Doug … and Megan. Casey considers her future and encourages Evan to do the same.

Sam makes a bold move amid the buzz of orientation day. Casey crosses paths with Nate. Elsa and Doug unpack the hazards of half-truths.

Paige invites Sam to redefine their romance, Casey struggles with complicated feelings, and Elsa attempts to find a new normal with Doug.

Cruel yearbook comments show Sam who’s got his back, a favor he repays at graduation. Feelings for Izzie confuse Casey. Elsa asks Doug a key question.

Ignoring Casey’s wishes, Elsa throws her a big birthday party, while Sam insists on following a decade-old birthday ritual. The bartender haunts Doug.

Sam loses his portfolio for his art school application and panics. Megan gets flirty with Doug, who makes a decision about Elsa. Julia calls Miles.

Casey tells Izzie what Nate did. Sam tries to figure out which colleges to apply to. Doug discovers a need to educate first responders about autism.

To prepare for college life, Sam sleeps over at Zahid’s. Sam’s $700 loss reunites Doug and Elsa with Arlo’s parents, former friends of theirs.

In peer group, Sam realizes he needs to manage his own money. Doug gets advice from Megan on dealing with Elsa. Evan meets Casey’s new friends.

Zahid teaches Sam to lie, while Elsa practices being honest. Evan helps Casey get over an embarrassment. A doctor visit forces Julia out of denial.

A peer group meeting leads Sam to an important decision. Detention with Izzie shows Casey they have more in common than she thought.

Casey feels less than welcome at Clayton. Sam asks Paige to spell out the rules of their “casual relationship,” while Doug sets boundaries with Elsa.

Sam’s frustration at being unable to find a therapist and Casey’s anxiety about going to a new school spark a blowup between the two.

After a disastrous dinner with Paige’s family, Sam makes amends at the school dance. Casey’s fury at her mom affects her relationship with Evan.

When Paige makes a confession to Sam, he creates a checklist to figure how he feels. Things with Nick suddenly get too real for Elsa.

Paige proposes having an autism-friendly school dance to the PTA. Sam makes preparations for losing his virginity. Doug and Julia help each other.

Sam becomes rattled after Paige invades his bedroom. Casey visits Clayton Prep and gets a taste of what life away from her brother would be like.

When a classmate shows interest in him, Sam makes a list of pros and cons to see whether she’s girlfriend material. Casey gets a prestigious offer.

Sam decides to update his look. Casey learns a family secret. Feeling like her family no longer needs her, Elsa seeks attention elsewhere.

When Sam learns his crush is already taken, dad Doug helps him woo her. A lost credit card sends Elsa back to the bar. Casey hears rumors about Evan.

Interested in having a girlfriend, Sam researches dating advice and puts it to the test. Meanwhile, his overprotective mom Elsa must learn to let go.

Sam, an 18-year-old on the autism spectrum, takes a funny, yet painful, journey of self-discovery for love and independence and upends his family.

The gang decides to leave the mansion in Zihuatenajo and find a new place to live, but Tandy has second thoughts.

The gang ventures out in search of what they think could be a new sign of life, but are surprised at what they actually find. Meanwhile, Todd makes a few…

A thermal heat detector reveals a potential sign of life outside of the Zihuatanejo village, but Tandy doesn’t want the group to split up to go investigate. Meanwhile, Todd and…

Tandy wakes up to a shocking discovery that is positive for everyone in the group, but it throws Todd into a spiral. Meanwhile, Todd and Erica share an emotional roller…

While Todd butts heads with Erica, Melissa is determined to form a strong female friendship with her. Meanwhile, Carol grows suspicious that a new stranger could be living nearby.

Todd sinks into a deep depression, leaving the rest of the gang to console him. Meanwhile, Tandy and Carol can’t keep their hands off each other.

Tandy tries being a helpful, responsible adult in order to finally win Gail’s praise. Meanwhile, Todd is furious with Melissa for keeping him away from Jasper.

After the graveyard incident, Tandy and Todd try to convince the rest of the gang that something is majorly wrong with Karl and something needs to be done. Meanwhile, Jasper…

Tandy and Todd introduce newcomer Karl to the rest of the gang. Meanwhile, the group searches for Jasper, who has gone missing.

Tandy and Todd stumble upon a new survivor, Karl, who has been trapped in a high-security prison in Mexico ever since the virus hit.

Todd asks Tandy for parenting advice when he notices that Jasper is acting more reckless than usual. Meanwhile, Carol and Erica realize that Jasper may be the only potential suitor…

Tandy tries to convince everyone he’s a feminist.