'The Lighthouse Dwellers' by Alan Fennell

Just as an aircraft begins its approach towards a new airfield, the light from a disused lighthouse comes on, confusing the pilot and causing him to crash. The ex-lighthouse keeper returns to investigate, only to be captured by members of an alien race who are using the building's power to provide energy for their city. Troy and Phones set off in Stingray to investigate…

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): 17th January 1965

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