SPOILER ALERT: Someone Returned to Grey’s Anatomy Last Night

If you have not watched Grey’s Anatomy yet, cover your ears.
After many all-nighters and sleepless nights, Meredith goes home.
She’s so tired that she passes out and is found in a curled up position on the ground.
Flips to a dream sequence that sees Meredith on a beach with a man waving at her and it’s…
McDreamy! Derek Shepherd!
Do you think Derek is back or is it just for this one dream sequence?