It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end of the Civil War. The balloon drifts for days and finally lands on a mysterious volcanic island with very unusual inhabitants. Also landing, in a better aircraft, is Rulu, a visitor from Mercury. She seeks a radio-active material that will enable her to manufacture an explosive that will destroy the world or, at least, the portion known as Earth in this 15 Chapter Serial from the 1950s.
Richard Crane
Marshall Reed
Karen Randle
Ralph Hodges
Gene Roth
Hugh Prosser
Leonard Penn
Terry Frost
Rusty Wescoatt
Bernie Hamilton
William Fawcett
George Robotham
Stanley Blystone
Roy Butler
Frank Ellis
Knox Manning
Zon Murray
Frank O'Connor
Sid Ross
Tom Tyler
Anthony Warde
Pierre Watkin