Episode: 3×20 (Season 3 Episode 20)
Name: Time After Time
Originally Aired: Apr. 19, 2007

Plot: When Izzie has to face her past, she turns to George for support and comfort. As Alex continues to work with Jane Doe, the two become more attached to each other. Meanwhile, Meredith and Derek begin to question their status while Cristina strives to repair her relationship with Burke despite her past history with Dr. Marlow that continues to damage their engagement.