Exhibit 15 ACKNOWLEDGMENT AND JOINDER TO THE STOCKHOLDERS AGREEMENT This ACKNOWLEDGMENT AND JOINDER (this "Acknowledgment and Joinder") to the Stockholders Agreement, dated as of March 19, 2004 (the "Original Agreement"), by and among each of the...Stockholders Agreement • March 3rd, 2005 • Cablevision Systems Corp /Ny • Cable & other pay television services • New York
