Tonight's "Grey's Anatomy" Season 13, Episode 8 will be like a trip through each character's Harry Potter Pensieve.

"The Room Where It Happens" (Thursday, November 10) is a "bottle episode" set in the operating room, solely featuring these four characters in the present, and their memories from the past: Meredith (Ellen Pompeo), Owen (Kevin McKidd), Stephanie (Jerrika Hinton), and Webber (James Pickens Jr.).

Jerrika Hinton told TV Guide, "The episode is basically a one-act play, and that's awesome. It's the structure of the episode itself that requires more from you. Because you're shooting it in order and because it is theater essentially, you must be alive in every moment, and you must constantly be listening and constantly be focused. It's a fantastic challenge that I would love to have more often."GREY'S ANATOMY - "The Room Where It Happens" - A difficult surgery brings back pivotal memories for Meredith, Richard, Owen and Stephanie, as they work together to save a life, on "Grey's Anatomy," THURSDAY, NOVEMBER 10 (8:00-9:00 p.m. EDT), on the ABC Television Network. (ABC/Michael Desmond)JAMES PICKENS, JR., KEVIN MCKIDDIn terms of the storyline, the promo and sneak peek showed tension in the OR with power battles between Meredith, Webber, and Owen. We also see Webber play a "game" where he has the doctors come up with a history for the John Doe they are working on, and that leads them on memory road trips. TV Guide confirmed that Meredith recalls the day she lost Derek (Patrick Dempsey); and we'll finally get to see Owen interacting with his sister Megan; and we'll learn more about Stephanie, seeing her sift through memories about growing up with a chronic illness.

"Everybody in that place has ghosts. Every surgeon there has ghosts that inform the way that they practice," Hinton said. The memory scenes will play out in flashbacks, TV Guide added, with the doctors interacting with ghosts from their pasts. Hinton said, "The way that this is set up with all of the magical realism in there, all of the spectacle ... standing in the room and seeing the special sets they built specifically for this and the little shadowboxes built into the set, it was all super theatrical on the day. I'm excited to see how that plays out."

It sounds like a creative episode, delving deeper into the character's emotional backstories but also focusing on their present tension as they face scrutiny under the direction of Eliza Minnick (who is also Arizona's new love interest).

Watch the promo and sneak peek videos for more on "The Room Where It Happens."

"Grey's Anatomy" Season 13, Episode 8 airs Thursday, November 10 at 8 p.m. on ABC.

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