Season 20 of ABC’s long-running medical drama Grey’s Anatomy premiered on March 14, 2024. After months of speculation about the potential departure of series star Meredith Grey (Ellen Pompeo), the beloved protagonist has officially returned for another dutiful tour of Grey Sloan Memorial Hospital. However, a 2016 fan theory has picked up a lot of steam online regarding Meredith’s potential fate on the show. The theory suggests that Meredith Grey has developed early dementia and possibly Alzheimer’s Disease, an illness that was established in her family in the 2005 pilot episode.