West and Gordon are sent to protect Dr. Crane, inventor of a powerful new explosive, but he and his daughter Lorna are kidnapped despite the agents' best efforts. They determine that the culprit is former 7th Cavalry officer Walter Kroll and converge on Kroll's farm outside Denver, where he is conducting tests with submachine guns and other advanced weaponry in an attempt to build an arms empire for himself.
Tropes present in this episode:
- Arms Dealer: General Kroll left the army because he wanted to develop new and better weapons of death. Then sell them for lots of money.
- Chekhov's Gun: Dr. Crane announces that he's had two massive heart attacks already and is living on borrowed time. Guess what happens to him at the end of the episode.
- I Have Your Wife: General Kroll does this with Dr. Crane's daughter, since Crane is reluctant to work for him.