I saw it when it aired on my local PBS station in the eighties, like Doctor Who and some other British shows. I liked it a lot. It's sort of the anti-Star Trek series, where the equivalent of the Federation are the bad guys. Wait, the Federation are often the bad guys in Star Trek, too... 🤔

A Mirror Universe Federation tv series from Britain with a difference, Gareth Thomas who played the Lead was Patrick Stewarts good friend and standby if he went sick at the Royal Shakespeare Company to take over his part !

Blake 7 was a British sci-fi series from the late 70's. I think it may have also aired in Canada at some point, but I could be mistaken about that. It might have also been rerun on the Sci-Fi channel here in the US at some point.