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 Vandemeer's daughter Karen believe in his innocence and search for the true murderer and his motives.

• David Oliver
• Susan Ursitti
• Monte Markham
• Eric Gilliom
• Jamie McMurray
• Jack Esformes
• William Frankfather
• Tom Rosqui