Fabrizio Zacharee Guido

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.

A cyber attack creates chaos in the hospital. Meanwhile, Drew draws on his medical and military training to treat a critical patient, and TC joins on a SWAT drug raid. Also: TC contemplates returning to Syria to tie up loose ends.

Jeffrey Tanner and his team help Detective Cavanaugh use the crowd to locate a missing high-school prodigy; Tanner and his ex-wife, Congresswoman Alex Hale, cope with the growing evidence that Carlos Ochoa may be wrongly imprisoned, and that Mia's murderer may still be at large.