Justin Alston

When Barney and Abby realise they share a hatred of Ted, they go to a bar together to rub their relationship in Ted's face.

The team tries to track down a killer that only strikes on Devil's Night, the night before Halloween.

Derek and the attendings go out to celebrate when he gets the grant he needs for his clinical trial; Meredith and Alex must fend for themselves during the night shift.

Jake disappears with the daughter of Charlie's neighbour, a former NFL player, and Charlie is left to cover his back. Meanwhile, Alan scores a hot date with the help of Charlie's Mercedes.

The team must identify the target when a bomb goes off in a dressing room at a military charity concert, and Jimmy gets ready to be a father.

Callen goes undercover to infiltrate a network of Chechen terrorists that are recruiting foreign fighters to join their cause, an attack in the US.