Just as a note, this is an anthology series, but it looks like contributors added the guest stars as Show Stars. Which... isn't right, is it?
I've fixed the first three episodes, since they aired on Hulu yesterday. I left the others in so we wouldn't lose the character pages. Do the character pages disappear if we delete the characters from the cast? I've never been quite sure, and I'd rather add them as guest stars and then delete the show star listings.
http://www.tvmaze.com/shows/18185/dimension-404/cast
Mark Hamill as the Narrator is the only "show star." Just as Rod Serling is the only "show star" of Twilight Zone, and so on. That gibes with the onscreen credits.
I'm not familiar with the contributor(s) who added the cast, so it didn't seems to be worth contacting them to let them know.
The episode order was also goofed up, but it looks like there were some last-minute changes by Hulu so that's not surprising. The current episode order reflects what Hulu actually aired yesterday. I'll continue to update as episodes come out over April 11, 18, and 25. And May 2? It's unclear if there'll be a seventh episode.
Thanks!