Question: when does meredith come back in season 13

title: Grey's Anatomy (season 13)
text: As the flames rage throughout Grey Sloan , Bailey issues a mass - evacuation while Jackson and Meredith desperately search for Stephanie and Nathan . Stephanie , who is revealed to be alive , is forced to perform a surgery on Erin 's leg , while the flames grow even bigger and looms closer towards the duo . Meanwhile , Owen and Amelia continue preparing for their journey , despite finding out about the incident at the hospital , to visit Owen 's MIA sister , Megan . Back at the hospital , Stephanie is forced to go to extremes as she braves the growing flames on her floor , ending up in the staircase . Crawling towards the roof access with Erin in tow , Stephanie comes to the horrifying realization that her key card is missing , which is needed to open the door . Seeing no other option , she wraps Erin in a water - soaked blanket as she prepares to sacrifice herself . But just as the smoke reaches her , she sees that her key card is within sight and fights to retrieve it . As Stephanie and Erin at last enter onto the roof , Erin codes leaving Stephanie hysterical for help . As Stephanie is performing CPR while screaming for assistance , Ben leads a group of firefighters towards Stephanie 's location , finally rescuing her at last . In the aftermath of the blaze , Minnick is fired by Bailey after an inquiry regarding the fire , Erin is alive and in recovery , Stephanie too is recovering from her burns as she tearfully tells Richard she 's quitting , Nathan finds out about Megan from Meredith who encourages him to reunite with his true love , Maggie is told by April that if she wants she could see Jackson , and Owen and Amelia finally arrive at Madigan Army Medical Center as Megan 's helicopter lands and she is pulled away on a gurney towards Owen , as he at long last comes to terms that his sister is truly alive .