Grey's Anatomy

ABC | 8:00 pm

Executive producers Krista Vernoff and Andy Reaser have a reunion with Holly Marie Combs and Alyssa Milano, who worked with them on the original "Charmed" series, in this new episode that's appropriately titled "Reunited." Combs and Milano guest star as two sisters forced to decide whether to keep another sister on life support after she is declared brain-dead following a construction site accident. Ellen Pompeo and Chandra Wilson also star.