Are there any Star Trek episode that feature only regular/recurring cast and no guest stars?

Question

In a typical Star Trek episode you have the regular cast (i.e. the ones listed in the intro), possibly some recurring characters (e.g. Garak or Lwaxana Troi), and usually also at least 1 main guest actor/actress who has a significant role in the plot.
There's typically also non-speaking background extras and some random non-speaking dude at the helm, but I'm not counting those.
So I'm curious: are there any Star Trek episodes from any series that feature no speaking guest cast, but only regular, recurring and background cast?
The (widely loved) TNG clip show 'Shades of gray' fits the description for the newly filmed parts (only the main cast and the universe's favorite recurring transporter chief Miles O'Brien), but the flashbacks do contain other guest actors.
I've looked at the list of bottle shows, but can't find any there.

Valorum · Accepted Answer

Several episodes of Voyager had no guest stars who weren't either future/former regular cast members or recurring cast members.

VOY: Parturition featured no guest stars.

VOY: The Gift featured a single guest star; former cast regular Kes (Jennifer Lien).

VOY: Course: Oblivion featured no guest stars.

VOY: Human Error featured a single guest star; recurring character Icheb (Manu Intiraymi).

Several episodes of TNG had no guest stars who weren't either future/former regular cast members or recurring cast members.

TNG: Time Squared featured two guest stars; recurring guest Katherine Pulaski (Diana Muldaur) and recurring guest Miles O'Brien (Colm Meaney).

TNG: Shades of Gray featured two guest stars; recurring guest Katherine Pulaski (Diana Muldaur) and recurring guest Miles O'Brien (Colm Meaney).

TNG: Parallels featured two guest stars; recurring guest Alyssa Ogawa (Patti Yasutake) and former cast regular Wesley Crusher (Wil Wheaton).

Several episodes of DS9 had no guest stars who weren't either future/former regular cast members or recurring cast members.

DS9: Fascination featured three guest stars; recurring guest Lwaxana Troi (Majel Barrett), recurring guest Bareil (Philip Anglim) and recurring guest Keiko O'Brien (Rosalind Chao).

DS9: Heart of Stone featured four guest stars; future cast regular Rom (Max Grodénchik), future cast regular Nog (Aron Eisenberg), recurring voice actor Majel Barrett and recurring guest Female Changeling (Salome Jens).

DS9: Return to Grace featured three guest stars; recurring guest Gul Dukat (Marc Alaimo), recurring guest Ziyal (in this instance played by Cyia Batten) and recurring guest Damar (Casey Biggs).

DS9: The Ascent featured two guest stars; future cast regular Rom (Max Grodénchik) and future cast regular Nog (Aron Eisenberg)

DS9: Call to Arms featured six(!) guest stars; recurring guest Garak (Andrew J. Robinson), recurring guest Weyoun (Jeffrey Combs), recurring guest Gul Dukat (Marc Alaimo), recurring guest General Martok (J. G. Hertzler), recurring guest Leeta (Chase Masterson) and recurring guest Ziyal (in this instance played by Melanie Smith)

DS9: Behind the Lines featured seven(!) guest stars; recurring guest Weyoun (Jeffrey Combs), recurring guest Gul Dukat (Marc Alaimo), future cast regular Rom (Max Grodénchik), future cast regular Nog (Aron Eisenberg), recurring guest Damar (Casey Biggs), recurring guest Admiral Ross (Barry Jenner) and recurring guest Female Changeling (Salome Jens)

DS9: Favor the Bold featured eleven(!!) guest stars; recurring guest Garak (Andrew J. Robinson), recurring guest Weyoun (Jeffrey Combs), recurring guest Gul Dukat (Marc Alaimo), future cast regular Nog (Aron Eisenberg), recurring guest Damar (Casey Biggs), recurring guest Admiral Ross (Barry Jenner), recurring guest Female Changeling (Salome Jens), recurring guest General Martok (J. G. Hertzler), recurring guest Leeta (Chase Masterson) and recurring guest Ziyal (in this instance played by Melanie Smith)

DS9: Sacrifice of Angels featured nine(!) guest stars; recurring guest Garak (Andrew J. Robinson), recurring guest Weyoun (Jeffrey Combs),  recurring guest Damar (Casey Biggs), recurring guest Gul Dukat (Marc Alaimo), future cast regular Rom (Max Grodénchik), recurring guest Female Changeling (Salome Jens), recurring guest General Martok (J. G. Hertzler), recurring guest Leeta (Chase Masterson) and recurring guest Ziyal (in this instance played by Melanie Smith).

DS9: Waltz featured three guest stars; recurring guest Garak (Andrew J. Robinson), recurring guest Weyoun (Jeffrey Combs) and recurring guest Damar (Casey Biggs).

DS9: Afterimage featured two guest stars; recurring guest Garak (Andrew J. Robinson) and recurring background character Morn (Mark Allen Shepherd).

DS9: Treachery, Faith, and the Great River featured six guest stars;  recurring guest Weyoun (Jeffrey Combs), recurring guest Damar (Casey Biggs),  recurring guest Martok (J. G. Hertzler), future cast regular Rom (Max Grodénchik), future cast regular Nog (Aron Eisenberg) and recurring guest Female Changeling (Salome Jens).

Several episodes of ST: Enterprise had no guest stars who weren't either future/former regular cast members or recurring cast members.

ENT: Shuttlepod One featured no guest stars

ENT: Doctor's Orders featured no guest stars

ENT: Observer Effect featured no guest stars

ENT: Dead Stop featured a single guest star, Voyager regular Roxann Dawson.

ENT: These are the Voyages had six guest stars; TNG cast regular William Riker (Jonathan Frakes), TNG cast regular Deanna Troi (Marina Sirtis), TNG cast regular Data (Brent Spiner), TNG cast regular Jean-Luc Picard (Patrick Stewart), TOS cast regular James T. Kirk (William Shatner) and recurring guest Shran (Jeffrey Combs)

PMar · Answer

ST:TOS episode "The Tholian Web" featured only recurring characters.

Matthew Barclay · Answer

If we're counting Star Trek: Enterprise, the episode "Shuttlepod One", which is a bottle episode of Malcom and Trip on the titular vessel, has no guest stars nor background performers (the only Star Trek episode to hold that distinction.
Note: Only seven characters/actors appeared on that episode, all of whom are regular cast members (Archer, T'Pol, Reed, Tucker, Mayweather (voice only), Phlox, and Sato
In the episode Doctor's Orders, which features Phlox hallucinating whilst the rest of the crew is in stasis, there are a number of uncredited co-stars and some archive footage is used
The episode Observer Effect also features only the main cast, and a couple of uncredited co-stars, and the main cast are playing not only their usual characters, but non-corporeal aliens in the bodies of their usual characters
Source: Memory Alpha (credit goes to Valorum for pointing out the other two episodes)

Are there any Star Trek episode that feature only regular/recurring cast and no guest stars?

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