Grey’s Anatomy (9pm, ABC) - It’s the end of an era as Cristina Yang ( Sandra Oh) says goodbye to Grey Sloan Memorial, to “her person” (best friend Meredith) and to “Grey’s Anatomy” after ten years on the series. Perhaps as remarkable as Cristina’s departure is this return: Dr. Preston Burke ( Isaiah Washington) shows up with an opportunity for his former protégé/fiancé.
American Idol (9pm, Fox) - Another finalist is eliminated tonight, but not until judge Keith Urban gets his shot to perform.
Vikings (10pm, History) - Ragnar and King Horik return to Kattegat in the Season 2 finale.
Elementary (10pm, CBS) - Sherlock is forced to partner with his estranged brother, Mycroft, to investigate a case with life-or-death consequences.