CBS says it has ordered a 13-episode third season of its New York City-set police drama \"Unforgettable\" and will air it next summer. The show stars Poppy Montgomery as a detective with a rare condition that allows her to remember and readily access the details of every moment in her life. Dylan Walsh plays her ex-boyfriend and partner. The program also stars Jane Curtain, Dallas Roberts, James Hiroyuki and Tawny Cypress.