Michael Pirkle is our special guest as we cover Space Patrol. The radio version ran from 4 October 1952 to 19 March 1955, for 129 episodes. The same cast performed on both shows. The writers, scripts, and directors were reused between the radio and TV incarnations, but the radio broadcasts were not limited by studio sets and became more expansive in scope than the television programs. Although there was seldom any deliberate crossing-over of storylines, some of the television villains regularly appeared on the radio (notably Prince Bacarratti), and during the "Planet X" story, both the TV and radio versions explored the rogue planet's invasion of the Space Patrol universe.