Susan Misner born February 8 1971 is an American dancer television and film actress Misner portrayed the doomed Grace Davidson on the ABCsoap operaOne Life to Live from March 12 1999 to November 17 1999In 2002 Misner appeared in the film Chicago performing the renowned Cell Block Tango as Liz Pop with Catherine ZetaJones Denise Faye Deidre Goodwin Ekaterina Chtchelkanova and Mýa Harrison Misner has gueststarred on many TV series including three of the series in the Law Order franchise Law Order Criminal Intent 20012005 Law Order Special Victims Unit 2002 and Law Order 2006 as well as both CSI Crime Scene Investigation 2002 and CSI Miami 2004 She had a dancing role in the 2002 film Chicago Misner appeared as Theresa on Rescue Me in 2006 and 2007 and later as Gretchen Martin in the 2007 miniseries The Bronx Is Burning She appeared in two episodes of the hit CBS procedural Without a Trace during the 20042005 television season She portrayed Alison Humphrey in several 2007 episodes of The CW series Gossip Girl and Sergeant Burnett in New Amsterdam 2008 In 2010 she played the girlfriend of therapist Paul Weston in the series In Treatment Currently she has the roles of Jessica Arndt in Person of Interest Sandra Beeman in The Americans and Stacy in Nashville Misner grew up in Pompton Plains New Jersey