Law & Order Beauty Diane Neal to Stir Up Trouble on ‘Suits’ June 5, 2012 News, Suits Actress Diane Neal is best known for playing ADA Casey Novak on the long-running NBC drama ‘Law & Order: Special Victims Unit, but now she will be playing another attorney this time on the USA Network series Suits. According to the folks over at The Hollywood Reporter, Neal will guest star as Allison Holt, a legal eagle who digs up a secret that could jeopardize Harvey (Gabriel Macht) and Donna’s (Sarah Rafferty) working relationship. Ouch! that doesn’t sound good for one of the show’s most favorite relationships (platonic though it may be). She will appear in the 6th episode of the returning season. Besides her work on SVU, Neal has had roles in episodes of ‘NCIS’, ‘White Collar’ and ’30 Rock’. ‘Suits’ will be back for its second season on the USA Network on Thursday, June 14 at 10/9c.