The Seven Deadly Sins

T7, E9: A woman is murdered during the burglary of her opulent Malibu home, a burglary in which a rare diamond, part of a set of famous Russian jewels known as The Seven Deadly Sins, is stolen. As Mark and Steve (BARRY VAN DYKE) ponder the details of the crime, they are joined by a woman who introduces herself as Inspector Vanessa Churchill of Scotland Yard.