Keir Dullea and Douglas Trumbull worked together on the 1968 Stanley Kubrick film 2001: A Space Odyssey as actor and Special Photographic Effects Supervisors, respectively. They would come together again 5 years later on a television show called The Starlost, which was created by Harlan Ellison. Ellison distanced himself from the production before the first episode even aired on Canadian TV…but there were 16 episodes anyway. Ben Bova served as science advisor.
Here’s the video of Dullea/Trumbull pitching the series…followed by all 16 episodes.