Mary McCormack is heading to House of Lies.
TVLine.com reports that the In Plain Sight vet will guest star as an angel investor for Kaan & Associates. McCormack will play Denna Altshuler, a tough-as-nails character who Marty will bring in to rescue his business.
In addition to starring on In Plain Sight, McCormack starred in the short-lived Welcome to the Family and appeared in a recent episode of Scandal.
