What We Have Here ...
Private Practice Season 4 Episode 19 (04/28/11)
Katie Kent returned to stir up trouble for Violet again. This time, Katie threatened to sue Violet for "breach of confidentiality." Although Violet felt that she was innocent at first, she soon realized she would have to defend her actions to more people than just Katie as her medical license is now in jeopardy.
Meanwhile, Cooper suspected that Charlotte might still have feelings for her ex-husband Billy. However, Billy's the one who has actually been hiding a secret from Charlotte. Violet finally gave her blessing to Sheldon to date Marla.
Moreover, Addison and Sam come to no conclusion as to where they are in their relationship as Addison realizes she cannot wait anymore for Sam and longs to have a baby still.