What happens
Jerry Hall, Joan Gregory, Captain Bradford and Mrs. Gregory sit anchored deep beneath the ocean in their stolen Euclidean submarine, believing they are safe. A message from Johnson in Los Angeles is cut short by a menacing voice demanding the combination to the captain's formula. The group soon realizes that a destructive radio beam from the island of Euclidea has struck their vessel, denting its hull. Joan explains the protective measures she has used and how the enemy located them. Joan and Jerry also describe an earlier encounter with a Euclidean musical experiment. The story of this Magic Island adventure continues from this point.
Aboard a stolen Euclidean submarine anchored one and a half miles beneath the ocean, en route toward Los Angeles.
Characters: Jerry Hall, Joan Gregory, Captain Bradford, Mrs. Gregory, Johnson, Thales
Listen for: The threatening radio voice demanding the formula's combination, and the explanation of the power beam and the musical keystone note.
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.