Some are teenage computer nerds; others, pranksters, computer watchdogs, former spies or thieves. All of them cruise the Internet, looking for ways to break into supposedly secure sites. In this PBS program computer security experts, government officials and hackers themselves discuss cyberspace security problems such as computer viruses, identity theft, credit card fraud and multi-million dollar theft. Produced and directed by Neil Docherty; hosted by Linden MacIntyre.