PRIVATE PRACTICE - "'Til Death Do Us Part" - As Violet continues to help Sam with Maya's wedding, Naomi refuses to take part as she works with Addison and Pete to save the life of a 25-week-old premature baby. Meanwhile, Cooper suspects that Charlotte's new boyfriend is abusing pills, on "Private Practice," THURSDAY, FEBRUARY 18 (10:01-11:00 p.m., ET) on the ABC Television Network. (ABC/CRAIG SJODIN) PAUL ADELSTEIN, STEPHEN LUNSFORD, TAYE DIGGS, GEFFRI MAYA, ELLIS WILLIAMS