Grey's Anatomy season 20 will see at least five main cast members

Grey's Anatomy' Season 20 Update as Cast Returns to Work

Ellen Pompeo returns in 'Grey's Anatomy' Season 20 teaser

Ellen Pompeo Returning to Grey's Anatomy Season 20: Is She Coming Back For Good?

Will Ellen Pompeo Be in Season 20 of 'Grey's Anatomy'?

Ellen Pompeo Returning to Grey's Anatomy Season 20: Is She Coming Back For Good?

Grey's Anatomy (season 5) - Wikipedia

Grey's Anatomy' Renewed for Season 20 with New Showrunner

Chandra Wilson - News - IMDb

Grey's Anatomy – original cast members confirm return for season 20

Grey's Anatomy' Season 20: Premiere Date, Cast and the Latest News – Hollywood Life

Comfort Viewing: Why I Still Love 'Grey's Anatomy' - The New York Times