I think the show worked best when it was a review of variations of loneliness.

* Dragon's Domain - Tony Cellini is burdened by the loneliness of a demon no one else sees. * Guardian of Piri - John Koenig is surrounded by the best of the best in his senior staff. But under the "spell" of the Guardian, he has disagree with all of them and make some very lonely decisions. * Voyager's Return - Ernst Queller is burdened by the memory of his mistake many years ago with development (and many deaths) of the Queller Drive. And it comes back to haunt him in real life, not just his imagination. * End of Eternity - The alien Balor shows us that immortality could be the ultimate form of loneliness.