For its landmark 400th episode, Law & Order: SVU looked to a special lady for the big occasion: Mariska Hargitay. Since its Law & Order: SVU, theres much more to the story here. Guest stars for the 400th episode includes Sarah Wynter, Aaron Sanders, Delaney Williams, Gage Polchlopek, Jason Bowen, Jenna Stern, Benton Greene, Daniel Cosgrove, Chantal Jean-Pierre, Olivia Sargent and Donald Dasg. Hargitay first started directing episodes with 2014s Criminal Stories. Including the 400th episode, Hargitay has directed five episodes of the long-running NBC police drama. Law & Order: SVUs 400th episode airs Wednesday, Feb. 8 at 9 p.m. on NBC.