John Cothran

The surgeons work as a team to free a boy from a hardening block of cement; Izzie helps Alex care for an ailing Rebecca; Meredith and Derek have one last chance at a positive result in their clinical trial.

The surgeons work as a team to free a boy from a hardening block of cement; Izzie helps Alex care for an ailing Rebecca; Meredith and Derek have one last chance at a positive result in their clinical trial.

Now that Emily Prentiss has returned, the unit track down a serial killer hiding out in the woods before he can strike again.

The death of Picard's archaeology professor results in a tantalising mystery involving Klingons, Cardassians and Romulans.

Hetty contacts Nate Getz to help Sam and Deeks move on, while the rest of the team head to the site of a crashed private jet.

Tony and Ziva travel to Colombia, where they are joined by Ziva's longtime mentor Monique in the search for missing Marine Lieutenant and Navy Chaplain Wade.