The promo for Grey's Anatomy Season 9, Episode 2: “Remember the Time” (airing October 4) is jam-packed with info about what goes down in this flashback episode, which takes us back to right after the plane crash from Season 8, Episode 24, "Flight."

We want to mine as much info as we can in preparation for the new episode, so we've taken a microscope to the promo to see what we can learn.

Read spoilers at your own risk! For more on Wetpaint Entertainment's philosophy on spoilers, click here.

At a different hospital: It looks like the docs are taken to someplace closer by than Seattle Grace-Mercy West (possibly the Boise Hospital they were headed to). That means the people treating them — and the ones in charge — aren't the docs we know and love .

Meredith confused? We see Meredith (Ellen Pompeo) sitting up, either in a hospital bed or in a rescue vehicle, asking "my sister, where's my sister?" Has she forgotten what happened, or does she just want to make sure someone found Lexie's (Chyler Leigh) body?

Owen is there for Cristina: As see in this sneak peek, Owen (Kevin McKidd) will be there for a very traumatized Cristina (Sandra Oh), who is non-responsive when Mer begs "say something, please!" but is aware enough to throw a heavy object at the window of her hospital room.

Callie's promise: Callie (Sara Ramirez) promises a distraught Arizona (Jessica Capshaw) that she won't let anyone cut off her leg (see an extended version of the scene here). Whoops.

Watch the preview for yourself below.

Catch the next new episode of Grey’s Anatomy on Thursday, October 4 at 10 p.m. ET/PT on ABC.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaMartin47.

Satisfy your Grey’s Anatomy addiction: Like us on Facebook and Follow us on Twitter and Tumblr.