Leith Burke

The BAU attempts to track a killer who preys on families, taking them hostage as they prepare to go on holiday.

The BAU investigates a case in Rossi's hometown, forcing him to revisit his personal and professional past.

Owen puts the residents through a rigorous trauma certification drill; Cristina is left alone to monitor an ill lung transplant patient.

Richard's 10,000th surgery is a liver transplant for two sisters; Derek and Lexie take on a case that had been declared inoperable; Teddy and Cristina try to swipe a case from Alex and Dr McQueen; Meredith tries to choose a specialty.

When a cyber bully targets Sabrina, Mickey comes up with a plan for revenge; Jimmy's lesson for Chip and Ben on how to be self-sufficient results in a painful disaster.

As Magnum, Higgins, and TC try to pull one over on a customs agent to get Higgins a green card, armed gunmen suddenly storm the federal building and start taking hostages.