Ellen Pompeo and Justin Chambers

Ever wonder what a "bright and shiny" Meredith would look like?

The Thursday, Feb. 2 episode of Grey's Anatomy will feature an alternate reality where Ellis Grey (Kate Burton) was never stricken with Alzheimer's, leading to a very different upbringing for Meredith Grey (Ellen Pompeo). The once dark and twisty doc is now happily... engaged to Alex Karev (Justin Chambers)?! The bad news? Derek (Patrick Dempsey) and Addison (Kate Walsh) are also still married... and she's pregnant! (Get even more scoop on the alt-episode here.)

First Look at Grey's Anatomy's alt-reality: Who has kids? Who's dating who?

Those are just a few of the shockers in store. Watch the first 10 minutes of the episode below to find out which Seattle Grace doc has changed the most: