Simon & Schuster Audio, New York, 1991.  ISBN 0-671-74045-8.  1 audio cassette tape with approximate playing time of 90 minutes, in shrink wrap with tears to wrap.  Read by Michael Dorn, enhanced with sound effects and an original score.  ‘The Enterprise crew is stunned when famed scientist Lynn Costa is murdered in the ultra secure Microcontamination lab.  She and her husband Emil had been known as science’s greatest ongoing collaboration and, together, they had received the Federation’s highest honors for their achievements in scientific research.  Determined to see the culprit brought to justice, Captain Picard assigns Lt. Worf and Counsellor Deanna Troi to the case.  Their routine investigation of the ship’s science labs soon reveals a dangerous web of deceit, betrayal, and madness.  Now Worf and Troi find themselves struggling against a ruthless assassin set on revenge – for whom murder is only the beginning…’ (from rear box)