666 Park Avenue stars Terry O’Quinn (Lost) and Vanessa Williams (Desperate Housewives); Arrow stars Stephen Amell (Private Practice), Katie Cassidy (Supernatural) and Willa Holland (Gossip Girl) are among the many talented performers and producers from Warner Bros. Television series confirmed to attend New York Comic Con 2012 for panel sessions and autograph signings with fans on Saturday, October 13, and Sunday, October 14.