This was the first of three Rocketman Adventure Serials
When Science Associates, a group of top scientists, is plagued by a series of murders, Jeff King is brought in to investigate. He learns that Dr.Vulcan, a criminal genius, is behind the deaths, plotting to steal the group's discoveries and take over the world using a "Sonic Decimator". Figuring that Vulcan is secretly one of the surviving scientists, King enlists the assistance of Professor Millard, believed by the rest of Science Associates to be among those who have died. Seeking to even the odds between King and the forces of Dr.Vulcan, the Professor equips his ally with a ray gun and a prototype rocket pack. With his foe hidden behind anonymity, King responds in kind, creating the identity of the Rocketman.
Donning his Rocket Man costume King goes from one hair raising rescue to the next in order to keep the newly invented Decimator out of the clutches of Vulcan and his minions.But Dr. Vulcan has deadly devices also. Can the Rocket Man expose Vulcan without revealing his own identity?
This was also one of Republic's last great serials and the inspiration for Disney's "The Rocketeer".
Tristram Coffin .... Jeff King
Mae Clarke .... Glenda Thomas
Don Haggerty .... Tony Dirken
House Peters Jr. .... Burt Winslow
James Craven .... Prof. Millard
I. Stanford Jolley .... Prof. Bryant
Douglas Evans .... Chairman
Ted Adams .... Martin Conway
Stanley Price .... Gunther Von Strum
Dale Van Sickel .... Prof. Drake/Henchman Martin/Gates/Miller/Rand
Tom Steele .... Henchman Knox/Taxi driver/Henchman Chase
David Sharpe .... Henchman Blears/Cliff/Stark
Eddie Parker .... Rowan
Michael Ferro .... Turk
Frank O'Connor .... Guard