Ian Ogilvy headed the cast of the obscure three-part British miniseries Menace Unseen. Ogilvy played Duncan Free, a computer consultant. When one of his co-workers was murdered, Duncan used his technological savvy to determine the culprit -- who, of course, had no intention of being exposed. Boasting an unusually strong supporting cast, Menace Unseen was distributed by Anglia Television in 1988.