 "Powderkeg" was syndicated in the 1970s and frequently aired by local U.S. TV stations, and was the only episode of the series to be released as a VHS videotape.The series featured a number of well-known guest stars including Leslie Nielsen, Kevin McCarthy, Jane Merrow, Keenan Wynn, Henry Darrow, David Canary, Ed Flanders, Morgan Woodward, and Eric Braeden.For filming, the series used two full-scale metal replicas of first generation (1912–16) Stutz Bearcats made by Hollywood car customizer and film car builder George Barris.