

A Mexican bandit is about to be executed in the United States, so his brother takes over a train and holds the passengers as hostages unless his brother is released. Now both the Americans and Mexicans are baffled as to what to do. One of the passengers — who wrote the letter for their captor — has a suggestion: call mercenaries Hank Brackett and Johnny Reech. They do, and as expected they do come up with a plan, but the president of the railroad is not sure if it will work.
Acting
Rod Taylor's weathered charm vs. Dennis Cole's pretty-boy swagger.
Production
Genuine locomotive stunts that CGI would murder today.
Writing
Snappy mercenary banter masking a bare-bones plot.
Director
Douglas Hayes
Trivia, insights & behind the scenes
Powderkeg was the pilot for Bearcats!, a short-lived 1971 series that lasted exactly one season. The train hostage premise was ditched for general mercenary adventures.
This aired during the brief 1970-72 window when networks thought audiences wanted cynical anti-heroes for hire — then sanitized them into weekly problem-solvers. The tension between those impulses is visible here.
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