In both the radio and TV versions the stories followed the adventures of Cadet Tom Corbett, Cadet Astro, and Cadet Roger Manning, at the Space Academy as they qualified to become Officers in the elite Solar Guard. The stories centered around their cadet training and the many adventures that the happened into.
The radio series consisted two part shows of one half hour each on Tuesday and Thursday. The Tuesday show was part I and the Thursday show was part II which concluded that adventure. The Tuesday show would close with tune in next Thursday when (description of the adventure) for part II of (title of that adventure)