Derek witnesses a horrible car accident and springs into action to save lives.
Sedona — Houndmouth
Derek heads to the airport; Meredith rushes to work with the kids; Bailey, Amelia & April perform surgery while talking to Derek on the phone; A speeding sports car causes an accident as Derek drives.
Derek tells Alana about the first time he kissed Meredith; The group hears sirens approaching; Derek waves goodbye to Sarah & Winnie, then starts to head home when his car is struck by a truck.
Derek's doctor realizes he has head trauma; the neurosurgeon finally arrives; Penny is kicked out surgery; Meredith sees the police arrive to the house; Meredith imagines of being reunited with Derek.
The nurse turns off Derek's respirator; Meredith flashback to previous moments with Derek throughout their time together; Meredith tells Derek that she & the kids will be okay.