PRIVATE PRACTICE - "The Parent Trap" - Two back-to-back episodes of "Private Practice" on THURSDAY, DECEMBER 3 start with "The Parent Trap" (9:00-10:00 p.m., ET), in which Addison performs a complex in utero surgery, proving not only her talents to her father but also finally giving them some common ground. Meanwhile Sam and Naomi deal with their own family crisis when they discover their daughter is growing up way too fast, and Violet does the unthinkable. (ABC/ERIC MCCANDLESS) AMY BRENNEMAN