[Warning: This story contains spoilers from Thursday's "Remember the Time" episode ofGrey's Anatomy.]

Grey's Anatomy returned to the site of the deadly plane crash Thursday when Meredith, Derek, Mark, Arizona and Cristina re-lived their rescue and the varied healing process for each of the Seattle Grace doctors.

Each of the five mini-stories -- the episode was told Rashomon-style -- helped to reveal how each of the survivors and the late Mark Sloan arrived at their current state depicted in last week season nine premiere.

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Here are the eight biggest takeaways from the hour.

1. Meredith (Ellen Pompeo) explains why she opted to remain in Seattle, despite the potential to see her dead sister (RIP, Lexie) around every corner, the hospital being the venue where her mother and George died and husband was shot. "This is the place where I fell in love. A place where I found my family. This is where I learned to be a doctor, where I learned how to take responsibility for someone else's life and it's the place I met you, this place has given me as much as it's taken from me. I've lived here as much as I survived here," she tells Cristina (Sandra Oh).

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2. After surviving the crash, Cristina is experiencing reactive psychosis, where she's awake but in a comatose state and violent when someone gets to close. Eventually discharged, she tells Owen (Kevin McKidd) she has vivid memories of the crash and four days without food that included hearing animals fighting over Lexie's corpse, ridding the bugs from Arizona's leg and trying to keep Mark alive. "I can't get out. Don't you see? I'll never get out," she tells Owen, partially explaining why she wound up moving to Minnesota.

3. Derek (Patrick Dempsey) has a special surgeon: Callie. Initially accepting that his career going forward may only include teaching, Derek asks Callie (Sara Ramirez) to perform her risky surgery on his injured hand that comes with a great reward if successful (full recovery) but a nasty consequence if not (reduced function).

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'Grey's Anatomy' Recap: How Did They Survive? (Video)