Here is the network description for Mischa’s upcoming guest role on Law & Order: SVU
03/03/2010 (09:00PM – 10:00PM) (Wednesday) : DETECTIVE BENSON (MARISKA HARGITAY) GETS EMOTIONALLY INVESTED IN A CASE WHEN SHE AND DETECTIVE STABLER (CHRIS MELONI) INVESTIGATE THE MURDERS OF SEVERAL YOUNG PROSTITUTES. When a series of young prostitutes are found murdered with homemade prayer cards attached to their bodies, Detectives Olivia Benson (Mariska Hargitay) and Eliot Stabler (Chris Meloni) struggle to find the common thread. However, just when they think that they’ve found the murderer, Captain Donald Cragen (Dann Florek) informs the detectives that another victim named Gladys (guest star Mischa Barton) has turned up with a prayer card. This time she survived. As the case unfolds, Benson finds herself getting emotionally invested in the survivor until she is forced to make a decision that she isn’t ready to face. Also starring: Ice-T (Detective Odafin Tutuola), Richard Belzer (Detective John Munch), Tamara Tunie (Dr. Melinda Warner), and B.D. Wong (Dr. George Huang).