"I Must Have Lost It On The Wind" is the first episode of the eleventh season of Grey's Anatomy and the 221st produced episode of the series. It is also the 332nd produced episode of the Grey's Anatomy franchise. It was broadcast on September 25, 2014.
With Cristina gone and her marriage on the rocks as Derek readies to move to D.C, Meredith finds her life in a state of flux as a deadly wind sweeps over Seattle. Meanwhile Maggie attempts to make a good impression on Meredith, her half-sister, but her efforts may be in vain as the two come to blows over a patient, culminating in an operating room showdown while treating a patient who lost his family and Maggie's presence has a profound effect on Richard, who finds himself revisiting parts of his past he'd put behind him, unknowingly letting Amelia in his secret. In the wake of Cristina's departure, the doctors try to rally behind Owen while Bailey and Alex learn they will have to compete for Yang's seat on the board when they learn the vacancy will be decided by a board vote. Derek makes a decision about his future while Callie and Arizona both find their decision to have a surrogacy jeopardized.
- "When I was five my mother lost me in the park. I don't remember much, except that one minute I was riding the carousel and the next she was gone. I don't remember how I found her. I don't remember how I got home. All I remember is what happened next. She told me not to worry, she told me everything would be fine. She told me it was time to play the quiet game so I knew I wasn't supposed to ask any questions. Or else, I might have told her I forgot my doll. I loved that doll so much, it killed me to leave it behind. Funny isn't it, the way memory works. The things you can't quite remember and the things you can never forget..."
- "There can be beauty in getting lost. Sometimes we have to get lost to find each other and sometimes we find each other, only to get lost all over again. You can't always control it, the thing that's going to set you adrift. And as you stand there on your front porch, staring at the life you're about to leave behind, you have to accept it's gone. It's lost, just like you. All you can do is stand very still, breathe in the moment, and try to be open to wherever the wind's going to take you next."
- "Le Boom Vent Suite" - Jill Scott
- "Ghost Of The Year" - Piney Gir & Correatown
- "I Will Be There" - Odessa
This episode's title originated from the song I Must Have Lost It On The Wind, originally sung by Elton John.