PRIVATE PRACTICE - "The End of a Beautiful Friendship" - Maya and her unborn baby are fighting for their lives on the operating table, and Addison, Amelia and Fife try everything humanly possible to save them. Meanwhile, Sam operates on an incoming crash victim and later makes a grim discovery; Cooper makes an ill-timed but valiant effort with Charlotte, and the staff's world gets rocked by an unexpected death, on the Season Finale of "Private Practice," THURSDAY, MAY 13 (10:01-11:00 p.m., ET) on the ABC Television Network. (ABC/ERIC MCCANDLESS) BILL MILLER, TAYE DIGGS, TIM DALY, KADEE STRICKLAND