Professor Vandemeer works on a secret project for the US-Air-Force called DART: a very small helicopter for scouting and defense. When he gets killed, Colonel Denton gets under suspicion. His son Scott and Vandemeers daughter Karen believe in his innocence … David Oliver, Susan Ursitti, Monte Markham, Eric Gilliom, Jamie McMurray, Jack Esformes, William Frankfather Added on Amazon Prime 2022-09-10.