In the first Six Million Dollar Man tv movie, Oliver Spencer wanting to keep Steve Austin in cold storage between missions. Even as a kid that struck me as some kind of existential hell.
In Max Headroom, the discussion about people being transmitted as data. Right now that doesn't raise and eyebrow with me, but it did back in the 80s.
The final moments of the last episode of Blake's 7 when everyone is gunned down. In Rumours of Death, also Blake's 7, when Avon comes across Servalan chained to the cellar wall. Great few moments of character interaction there. The power dynamic was turned on its head and this led to some added edginess and tension, too.
The Professionals Discovered in a Graveyard when Doyle is shot, and filmed in slow motion in a hail of blood, milk and shattered glass. Stuff like this didn't happen to macho policemen in the 70s.
More later, I expect.