Penelope tells her family she has a date and Lydia says she’s going to church, but each secretly goes elsewhere. Meanwhile, Elena tests an attraction.

When Penelope finds porn on Alex’s laptop, she struggles to talk to him about sex, but their reluctant conversation leads to a surprising discovery.

Although she wants to be accepting and open-minded, Penelope feels weird about Elena’s revelation. Seeking advice, she makes an unexpected connection.

Everyone pitches in to prepare for Elena’s quinceañera. While rehearsing their father-daughter dance, Elena reveals a truth about herself to her dad.

Scott and the others must make a discovery before it’s too late.

Scott and Malia prepare for battle while Argent searches for an old ally.

Gerard initiates his final attack on the Supernaturals of Beacon Hills

Scott, Lydia and Malia have to take drastic measures to quell the growing violence in Beacon Hills, while Liam endures his own gauntlet at the high school.

When Scott and the others struggle to protect two new werewolves, an unlikely ally joins in the fight.

Liam and Theo attempt to draw the Hunters away from Beacon Hills.

After a shocking attack leaves the pack reeling, Scott sets out to recruit reinforcements.

As Scott readies Beacon Hills for his imminent departure, a mysterious presence breaks out of Eichen House.

While Scott and the others desperately pursue a missing werewolf, Melissa and Argent investigate the nature of a strange body.