1975-Space: 1999

Space: 1999 was a British import that was syndicated on American television. Martin Landau and Barbara Bain were married at the time and coasting on their popularity from Mission: Impossible. In the second season, the alien Maya was added to the cast as sort of a female shape-shifting version of Spock. The Moonbase Alpha crew was on a traveling moon and faced aliens and weird situations every week.
Lots of behind the scenes production problems plagued season two. Cast members would come and go with no explanation. Episodes were often shown out of order, especially in the syndicated foreign markets, which added to viewer confusion. 48 episodes were produced in all; the series abruptly ended with the final episode of season two and did not return.
The series has had several packaged media releases that are currently available. 
Space:1999 on Amazon