Reconciling the Differences (31773 words) by ScribblerQueen1
Chapters: 7/?
Fandom: Grey's Anatomy, Supergirl (TV 2015)
Rating: Teen And Up Audiences
Warnings: No Archive Warnings Apply
Relationships: Alex Danvers/Maggie Sawyer, Meredith Grey/Derek Shepherd, Lexie Grey/Mark Sloan, Arizona Robbins/Callie Torres, Jackson Avery/April Kepner, Kara Danvers/Lena Luthor
Characters: Alex Danvers, Maggie Sawyer, Meredith Grey, Derek Shepherd, Lexie Grey, Mark Sloan (Grey's Anatomy), Arizona Robbins, Callie Torres, Jackson Avery, April Kepner, Kara Danvers, Lena Luthor, J'onn J'onzz | Hank Henshaw, Alex Karev, Miranda Bailey, Maggie Pierce
Additional Tags: Brainwashing, Getting Back Together, Kidnapping, Derek Shepherd Lives, Mark Sloan Lives (Grey's Anatomy), Arizona and Callie didn't divorce, plane crash still happened, Arizona still lost her leg, Alternate Universe - Canon Divergence, Sanvers Endgame with Mark & Lexie Closure, Plans for Alternative Ending for Slexie
Summary:
Maggie Sawyer after her breakup with Alex Danvers, comes across a missing person's case for an Alexandra Grey, who looks suspiciously like her ex. She uncovers a kidnapping and brainwashing conspiracy at the DEO as a result. With the help of J'onn they uncover it and Alex realizes that her and Kara's whole lives are a lie and is trying to cope with remembering and reuniting with her friends and family. Meanwhile Kara is struggling with her relationship with Clark and how his abandonment of her allowed her to be brainwashed.