It was a mini-series based on a novel by Ken Follett, but ‘The Pillars of the Earth’. It starred Eddie Redmayne.
Babylon 5.
Unless we have watched different Babylon 5 shows I'm fairly certain that it takes place in a space station.
I think at some point in the future, after the main storyline ends, maybe a thousand years hence, humanity gets flung back into the dark ages, meaning we have to re-learn how to be a technological race without assistance from the elder races. It has been a long, long time since I watched it and I might have misunderstood/misremembered what was going on though.
Black Adder
First Season, to be specific