Ellen Pompeo is set to return as Dr. Meredith Grey in 'Grey's Anatomy' Season 21 for at least seven episodes, continuing her role as narrator and executive producer. This follows her reduced appearances in recent seasons due to other commitments, but she remains a pivotal figure in the show. Fans can expect her to be more present in the upcoming season amidst cost-cutting measures affecting other regular cast members. Meanwhile, Kevin McKidd will star in a new family drama, 'The Primrose Railway Children,' adapted from Jacqueline Wilson's novel, filming in Scotland alongside Nina Toussaint-White and a young British cast.