I watched this sci-fi show as a kid during the late 1980s in South Africa. The show itself likely came from Japan. It definitely wasn't a domestic production.
The show's protagonists were human like, in conflicts with aliens. The aliens captured many of the humans during the course of the show and somehow converted them to do their bidding. The conversion included the removing of one of the human's arms and replacing it with something either mechanical or insect like. The humans also then wore a type of head gear (very Borg-like), which allowed the aliens to control them.
Towards the end of the show, one of the humans controlled by the aliens was liberated and ended up helping the humans.
The name "Commander Mary" comes to mind, but it may have nothing to do with the original Japanese name.