Michael Roark

Isobel arrives in town and intimidates a shocked Alaric into arranging a meeting with Elena. Elena is horrified when she finally comes face to face with her birth mother.

Jenna is devastated by Isobel's unexpected arrival; Damon and Jeremy try to help Bonnie find a spell that will harness her ancestors' power.

Maggie and Meredith disagree with Derek about the best way to approach a patient's case, which leads to a bigger argument between the couple. Callie feels responsible when one of her veterans is pushed too far and results in a devastating diagnosis.

Callen and Sam travel to the USS Allegiance in the Persian Gulf; the team learn more about ISIS sympathisers targeting military locations.

Tommy and Barry find themselves trapped in the rubble of a collapsed building.

After Abbie's sister escapes from a psychiatric hospital, Ichabod helps Abbie search for her; Ichabod and Abbie learn more about the evil they are facing, including its name.