'This Is Us' Season 4: Meet All the New Characters & Actors!

Jennifer Morrison as Cassidy

Former House and Once Upon a Time actress Jennifer Morrison plays a soldier who has just returned from war and is separated from her husband. She clearly is still dealing with the trauma of being in the war and goes to a group counseling session. During the session, Jack’s younger brother Nick (Griffin Dunne) throws a rock through the window.

Justin Hartley‘s Kevin gets a call to bail him out of jail and we see him booking a flight.