Watched this in the late 80’s i think. That’s when i last watched it. Its fairly low budget, so im guessing it could possibly be a TV-movie, but can’t be sure.
I don’t have much to go on, but its about a family or family member who gets stuck in this black dimesion and the other family members have to get them out. The lead father figure character looks kinda like Robert Wagner, but its probably not since none of his movies on IMDB seems to fit my description.
The movie is a drama with some scifi elements. It’s kinda Twilight Zone-ish; kinda like that 4th dimension episode entitled “Little girl lost”. It’s low budget looking because in this dimension, its mostly just a black background with a spotlight or something that shines on the actor(s). I remember some of the actors suits were shiny/silvery/reflective; kinda like thermal suits because it had something to do with needing it for use in that dimension. And i think there might be a robot involved, AI, or entity keeping them there.
“Invitation to Hell”(1985)? It stars Robert Urich and he goes into the mouth of hell at the end to rescue his family and he’s wearing a spacesuit he invented which can withstand really high temperatures.
and yes it was a made for tv movie.