Space Cadets are undergoing survival tests on Neptune's second moon, the perfect opportunity for "The Cobra" to strike! Cadet Happy is captured. Commander Corry infiltrates the gang leadership.

Space Patrol - Episode 74 - The Serpent Of Saturn

Space Patrol is a science fiction-adventure series that first appeared as a TV series from 1950 to 1955 on ABC Television. The radio version was produced almost simultaneous with the TV version.The radio series also ran from 1950 to 1955. The actors, writers, and director of the TV show were also the ones who worked in the radio adaptation. The series' main character was Buzz Corry, the Commander-in-Chief of the United Planets Space Patrol, who fights interplanetary monsters along with his partner Cadet Happy Osborn. Those characters were portrayed by Ed Kemmer and Lyn Osborn, respectively.