CHAPTER TITLES: 1: The Monstrous Plot; 2: The Mysterious Friend; 3: The Executioner; 4: Sabotage; 5: The Ray of death; 6: 30 Seconds to Live; 7: The Flooded Mine; 8: S.O.S.; 9: Ladder of Peril; 10: The Infernal Machine; 11: The Red Circle Speaks; 12: Flight to Doom.
The prisoner number, 39013, is seen again in "Beavis and Butthead Do the Universe" as Beavis' prisoner number (Butthead is 39014).
The role of Bert was played by David Sharpe, who was actually a member of Republic's celebrated team of stunt men. Because of his lead on-camera role, he was doubled by teammate James Fawcett for the more dangerous stunts.
Episode 1 has a running time of approximately 28 minutes. Episodes 2-12 have a running time of approximately 17 minutes each (DVD timings).