I remember watching this as a kid, it reminded me of the power cuts in the 70's, we'd be sat in the cold no telly and then this quite bleak show may or may not come on, I thought at the time how good they had it, we didn't get red cross parcels.
David McCallum got in a lot of stuff around this time, I can't remember a weird series he was in, he was full frontal with his guts hanging out, they did some TV. in the 70's