OT: your best Sci-Fi episode ever

[ncc1701e]

For me, this is the Doomsday Machine, Star Trek TOS.
https://www.youtube.com/watch?v=0FhPivoIJm4

[Solaristics]

Babylon 5: Severed Dreams. But you have to watch every episode before it to appreciate it fully.

[SirHoraceHarkness]

Goodness there are so many good scifi shows with superb episodes but I'm a cold war kid and grew up watching star trek and this episode always stuck with me.

https://www.dailymotion.com/video/x82a1oz

[drillerman]

ST:TNG - The Inner Light.

Absolutely stunning story compressed down to 40mins

[deMangler]

ORIGINAL: drillerman

ST:TNG - The Inner Light.

Absolutely stunning story compressed down to 40mins

I came to this thread to post this exact reply.
There are no words.

[Chris0War]

Above & Beyond - The angriest angel. part 2 comes to mind, [&o]chiggy von richthoven

[LordMM]

DS9, In the pale moonlight.

[ncc1701e]

TNG, Yesterday's Enterprise was quite good too.

[Cauldyth]

Futurama: Where No Fan Has Gone Before

[wetpig]

No spaceships in this one but its still sci-fi.

https://www.youtube.com/watch?v=CpEIGws ... tevenPrice

The Prisoner: The Schizoid Man. This has to be one of the biggest mindfucks I've ever seen, they (Number 2) try and get information out of Number 6 by convincing him hes not actually Number 6 and is instead impersonating Number 6 (himself) so that he can break the will of the fake Number 6 who is pretending to be the real Number 6 in order to break the will of the real Number 6.... yep

[thegreybetween]

ST: TNG - The Inner Light; this is my default answer to this question (and the reason I learned to play the pennywhistle)

Some other contenders for personal favorites include:

Firefly - Jaynestown
Battlestar Galactica - 33; Scar (the scene where Starbuck lists all of the fallen = good stuff)

I haven't had a chance to digest The Expanse well enough to call out particular episodes, but there is definitely some potential there for enduring greatness as well.