So… you’re a fan of obscure, not-very-successful SF TV series, huh? Never mind your Star Treks, your Farscapes, even your Red Dwarves or Blake’s Sevens, we’re talking about series that are so lost to time and syndication that they sound like parodies of the space opera genre. Well, have you ever even heard of, let alone seen, Excalibur? Ran for two seasons on the BBC in the mid-seventies, ran for two seasons, combined Arthurian myth with Crowleyan mysticism, and was lost forever when the BBC, as was its custom, erased the videotapes to reuse them. Ring a bell? (Difficulty level: never actually existed.)
Excalibur is actually a collaborative fiction project by J. J. Guest, G. C. Baccaris, and Duncan Bowsman, an interactive wiki simulation in Twine that gives summaries of episodes (season 1, with 2 yet to come), actors, and inside baseball/backstage drama.