Operation Ivy Bells 

Sophia Di Martino raises a tale of undersea espionage from the depths.
In 1970, Captain James Bradley had a daydream - a daydream that inspired one of the most audacious aquatic espionage missions of all time.
Operation Ivy Bells gave the USA unprecedented access to Soviet undersea communications cables, and hastened the end of the nuclear stand-off between the two nations. Sophia Di Martino joins journalists Christopher Drew and Sherry Sontag for a thrilling and often claustrophobic tale of covert submarine warfare.
From SPYSCAPE, the home of secrets. A Cup And Nuzzle production. Series producers: Gemma Newby, Joe Foley. Produced by Ashley Clivery. Music by Nick Ryan.