ABC showcases its upcoming primetime lineup with an exciting peek at its new shows and an interactive booth at Comic Con 2011, taking place in San Diego in late July. “Once Upon a Time,” “Charlie’s Angels,” “Castle” and “The River” stars and executive producers will participate in the convention for Q&A panels, press room interviews and special autograph sessions. Additionally, the much buzzed about new drama series, “Pan Am,” will also be represented at Comic-Con.