Lena is excited that her family is coming together to throw her a 70s-themed 40th birthday party. But, when Lena’s mom Dana shares her suspicions about Stewart’s behavior, it threatens…

Callie admits her past relationship with Brandon to her moms. But before Stef and Lena can even process the information, the school goes into a “Code Blue” lockdown when it’s…

In the aftermath of the school lockdown, Mariana is called out by other students who blame her for Nick’s actions. Callie is also taunted at school and her inappropriate reaction…

As the family deals with the aftermath of the terrible car accident, Stef is determined to find the driver responsible for the crash. Callie continues to volunteer at the drop-in…

As a dangerous, acidic fog approaches, Clarke, Finn and Wells set out in search of a seaweed-like plant to make an antibiotic poultice for Jasper’s wounds, while a vulnerable young…

Bellamy, Clarke and Finn try to protect Charlotte when everyone learns she killed Wells. On the Ark, Abby risks getting floated in order to give Raven the chance to launch…

When the remains of a woman from a wealthy family are found in a national park, the team thinks she may be a victim of the Ghost Killer; Booth’s career…