A group of scientists busy exploring the surface of the moon, discover a perfectly formed sphere hidden in the ground, so perfect that they assume it's manufactured, however it contains an intelligent life.
It took a little time for me to get into Moonstone, but when I did, I enjoyed it. Quite a complex storyline, there is a definite element of cleverness to it, with the overall conflict mirroring that of two of the central characters.
The tension that exists between Stocker and Anderson is integral, but it's really well played out, both characters were pretty good.
Lots of scientific jargon and gobbledegook to enjoy, most of it went over my head. Some nice special effects for the time, it's a good looking episode, sets and costumes looked good I thought.
It's a story of morals dressed up in a moonbase conflict, it's a good watch.
7/10.