PRIVATE PRACTICE - "All in the Family" - Addison and Sam's relationship is strained when they disagree over the treatment and safety of a comatose patient who has become pregnant, while Pete and Charlotte are faced with the ethical dilemma of revealing the HIV status of a patient who has been in a serious auto accident. Violet crosses some boundaries with Pete's family as she gets caught up in the fray of Lucas's first Halloween, on "Private Practice," THURSDAY, OCTOBER 28 (10:01-11:00 p.m., ET) on the ABC Television Network.(ABC/RON TOM) AMY BRENNEMAN, TIM DALY