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

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.

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.

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

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.