It came up in another thread, but are Doohan, Takei, Nichols, and Koenig "show stars" on original Star Trek.
For:
They're mainly considered main stars of the show.
The movies "promoted" them to major players in the series.
The movies mean that a lot of people think of them as show stars.
Against:
They're listed in the end credits instead of the opening credits like Shatner and Nimoy (and 2+ Season Kelley).
They are sometimes listed after "real" guest stars.
They have a smaller font.
Even among themselves they're not listed at the same level/font size.
They act like recurring guest stars, like recurring guest stars acted on other shows. For instance, there are several characters on Yancy Derringer who were just as prominent as Chekov or Uhura on Trek. But... they're not show stars at TVMaze or anywhere else.
What about Chapel and Rand? They played pretty significant roles sometime in the show, they appeared in at least some of the movies, and Majel Barrett appeared in about as many episodes as Koenig did. They were often billed at the same place in the end credits, in the same font size, often on the same screen. Why is Chekov currently a show star but Chapel isn't?
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The indecision means that we have odd listings like this one:
http://www.tvmaze.com/people/48070/james-doohan
So... Doohan is a show star for 26 episodes, but a guest star for 4 episodes? (as of this writing) Say what? The last edits were 9/2016, so it's not like the person making the changes hasn't had time to finish the last few. Having Doohan as both seems... rather confusing.
Thoughts?

