To elaborate on my criteria: these should be episodes that can work with a minimum number of sets, no special effect and modest-to-minimal practical effects, and amateur though dedicated actors.
Two examples come to mind.
The first is TNG’s “Measure of a Man”. This episode is almost entirely dialogue and takes place in large part in a single conference room. You could probably do a pretty straightforward 1:1 rendering of this episode on stage.
The second is DIS’s “Species Ten-C”, in which the crew make first contact with the titular species and determine how to communicate. This would require more creativity on the part of the production, but given that the 10-C communicate using light, I imagine that even an amateur production could do something compelling with practical effects.
I’ll admit that I am biased: I think I tend to prefer episodes that meet these criteria. I like my Trek talky and tend to have a soft spot for sappy and hammy episodes. But what intrigues me further about these stories is their ability to pass into cultural myth. I’m not saying that these are the only episodes that could transcend Trek and move into the cultural fabric of the era (think of Luke Skywalker and Darth Vader), but they seem like they might have the best shot.
What do you think?
“Muse” Voyager S06E22.
It would be so meta because it’s already an episode doing a play in an amphitheater.
Similarly, “Frame of Mind” TNG S06E21!
“Waltz” from DS9 would work really well I think. If you cut out the b plot of trying to find sisko, you only need 5 actors, and it takes place in one cave. You could probably get away with one set, maybe two or three props, and no practical effects.
TOS: The Conscience of the King. The script feels like a stage play. There are no space battles or other big set pieces. It’s just people talking in different settings but it’s a gripping drama.
“Remember Me” could make for an interesting (almost) one-person show.
“Spock’s Brain” actually was licensed and performed by a community theater as a comedy. The teaser and part of the first act used to be on YouTube.
How about DS9’s “The Wire”. A powerful story of isolation, suffering, addiction, and the power of friendship coupled with medical professionalism. I have to admit I don’t recall anyone else’s role other than Dr. Bashir’s and Garak’s (and some momentary spots with Quark and some random nurse). I don’t remember what the B plot was.
deleted by creator
Throwing Voyager’s ‘The Thaw’ into the mix.
It’s definitely a polarizing episode, but I think it’s one of the strongest. It’s a better adaptation of the premise of Stephen King’s novel ‘It’ than many others.
The episode itself is primarily staged in an artificial environment that would lend itself well to a theatre set. It might be possible to reduce the number of sets on Voyager itself to one.
TNG’s ‘The Most Toys’ likewise principally takes place in a single room.
“Spectre of the Gun” has a pretty surreal set and I could easily imagine it as a play.
TOS “The Empath”
We require posters here to explain their reasoning. Could you elaborate on this episode would make for a good stage play?
“Duet”, as it’s a loose adaptation of the play (originally novel and later also film) The Man in the Glass Booth.
Legal procedure episodes work well as stage plays, The Cane Mutiny was a play before becoming a feature film.
So we got Court Martial, The Menagerie, Measure of a Man, The Drumhead, Devil’s Due, Tribunal, Rules of Engagement, and Ad Astra per Aspera.
What about DS9’s In The Pale Moonlight or It’s Only a Paper Moon?
We require posters here to explain their reasoning. Could you elaborate on why these two episodes might make for good stage plays?
Well, the OP spelled out their criteria explicitly.
these should be episodes that can work with a minimum number of sets- In The Pale Moonlight could work on a single set. It’s Only a Paper Moon could work with two. DS9 and holodeck/Vic’s club.
no special effect and modest-to-minimal practical effects- In both cases the episode is carried out through dialogue.
amateur though dedicated actors- This one’s a little harder to quantify, so I’ll leave that up to OP’s judgement.
In addition, they deal with themes that are relatable without being exposed to the context of the story. Moreso It’s Only a Paper Moon than In The Pale Moonlight.
Fascination would probably be fun. Or Dramatis Personae.
edit: oooh, how about Repression?? Pagh t’em far, B’tanay!
Ballance of terror would be great, I’d stage it with both bridges on stage, with the view screens facing each other center stage. while the action is happening on the enterprise have the lights on the Romulan bridge at 15-20% and vise versa. My production would sacrifice the surprise reveal in favor of some scenes on the Romulan bridge in act 1.