Plymouth is a TV Movie or a pilot for a show that was never picked up depending on how you want to dress it up.
Here's the set up: The residents of a town displaced by an industrial accident agree to take over a failing mining base on the Moon as their new place to live and work. Their first big test comes in the form of a wave of radiation from a massive solar flare.
Interestingly these appear to be the same suits as previously blogged in regard to The Outer Limits - Voyage Home. (1995) As it was allegedly one of the most expensive TV movies ever made lets assume the suits were created for Plymouth and then had a career on their own afterwards. I'll correct later if we find an appearance earlier than this one.
What I really like about these is the customised space helmets, presumably so that each astronaut could recognise his colleagues. They remind me of some illustrations from a space exploration book I had as a nipper, which I'll blog sometime in the new year.