PRIVATE PRACTICE - "In Which Charlotte Goes Down the Rabbit Hole" - Charlotte seeks Pete's help in treating her insomnia, Naomi goes on her first date since college, Cooper suspects that his patient's injuries aren't an accident, and a patient asks Addison and Naomi to conceal her fertility from her husband, on "Private Practice," WEDNESDAY, OCTOBER 31 (9:00-10:02 p.m., ET) on the ABC Television Network. (ABC/MICHAEL DESMOND) KATE WALSH