'Ghost of the Sea' by Alan Fennell

After being plagued by nightmares, Commander Shore recounts the story of how he was crippled five years ago, when he was in a battle with an underwater craft; he was subsequently saved by a mysterious stranger, whom he never saw again… that is, until Troy encounters him during a battle with a hostile craft…

Don Mason (Captain Troy Tempest), Robert Easton (Lieutenant George Lee ‘Phones’ Sheridan / Agent X20), Lois Maxwell (Lieutenant Atlanta Shore), Ray Barrett (Commander Sam Shore / Lieutenant Fisher / Titan)

Directed by David Elliott
Produced by Gerry Anderson

TX (UK): 3rd January 1965

Notes:
*Featuring Captain Troy Tempest, Lieutenant George Lee 'Phones' Sheridan, Commander Sam Shore, Lieutenant Atlanta Shore, Lieutenant Fisher and Marina