What happens
Space Patrol agents Buzz Corey and Happy investigate the Cobra Gang, a criminal syndicate whose hidden lab lies beneath Jupiter City. A woman named Esma Rochelle, who has been forced to make synthetic diamonds for the gang, attempts to sell fake gems to a purchasing agent, Victor Barrett, and is later confronted by patrol officers outside the Cosmos Hotel. Their search leads through the abandoned water mains under the city, where the agents discover that the gang is trying to flood the tunnels. The transcript covers only the first part of the episode, so the outcome of the chase is not included.
Jupiter City in the 30th century, including the Cosmos Hotel, the space patrol headquarters, and the abandoned water mains beneath the city
Characters: Buzz Corey, Happy, Esma Rochelle, Nick Roark, Gargoth, Victor Barrett, Haffa
Listen for: The agents' realization that the old water mains beneath Jupiter City hide the Cobra Gang's lab, and the rush of air and water that signals a flood in the tunnels
Written from the episode itself; it never gives away the ending. Every recording is remastered for the stream: cleaned of rumble, hiss and mains hum (and the old TV whine where we found it), then levelled in two passes to steady broadcast loudness, so one show is never quieter than the next.