Amelia and Koracick tackle a daunting surgery on Catherine while Richard and Jackson hope for the best. Meanwhile, Richard urges Meredith to visit her father, Thatcher, before his time is up.

A sea of patients flood Grey Sloan Memorial after gunfire goes off at a parade. A blast from the past throws Maggie off her game on the same day that Meredith tries to talk to her about dating Deluca. Meanwhile, Owen and Amelia get some potentially life-altering news about Betty.