Cooper had a recurring role as Valerie Harris on four episodes of the Fox TV series 24, portraying a Homeland Security official who was part of a takeover of the Counter Terrorism Unit. She said in a Toronto Star interview in 2008 that the project reunited her with Jon Cassar, the show's executive Producer who had directed her on Jake and the Kid. Because each season of the show took place on one day, she never had a wardrobe change. She said, "You get six or seven multiples of the same outfit. Good thing I look good in blue. I had a navy blue suit with a light blue shirt."