PRIVATE PRACTICE - "A Step Too Far" - At the launch party for Violet's book, Sheldon falls for the smart, beautiful Dr. Marla Phillips (Alex Kingston), even though she's the critic who panned Violet's tome; meanwhile, Addison's and Pete's patient is caught in a love triangle with her brother-in-law and sister, for whom she is a surrogate, and Cooper and Sam try to convince a family to make their son's health a priority over his successful wrestling career, on "Private Practice," THURSDAY, MARCH 24 (10:01-11:00 p.m., ET) on the ABC Television Network. (ABC/MICHAEL DESMOND) BACKGROUND: TAYE DIGGS, PAUL ADELSTEIN, PATRICK ROBERT SMITH, MICHAEL JACE, ADINA PORTER, TEQUAN RICHMOND (ON FLOOR)