Warner Bros. Television will debut new content and engage fans during panel sessions at this year’s WonderCon, the annual comic book, science fiction and motion picture convention in Orange County, California. WBTV will feature episodes of “The Secret Circle” and “Person of Interest” on the big screen on March 17, hold a presentation and panel session for Cartoon Network, Warner Bros. Animation and DC Entertainment’s new programming block, “DC Nation,” on March 18 and offer panel sessions for both “Alcatraz” and “Fringe” on March 19.