well, just to specify, s03e02 "Playtest" isn't about torture. The scenario is simply about being in a VR setting where the mind can populate the surroundings with one's personal fears, supposedly as a way to explore and possibly overcome them. But also it seems to be considered one of the lesser episodes of the season. I'll rank them all from my perspective after I finish the last one tonight....
EDIT: Just finished the last one. It starts out as a regular procedural so to speak, but the enormity of it by the end is pretty powerful. I managed most of the time to get to the twist a minute or two ahead of the show, but I missed a few and it's pretty crazy by the end.
True spoilers -- it's a total kitchen sink there:
One of the best lines: "Yes, the government's a cunt." [in a tone that suggests "Can we move on now?"]
There were some others -- like most of the prime minister's lines as he's flipping out in the security meeting.
Benedict Wong just seemed to have one bad day after the next.
Also, for those who have seen this episode and "White Bear":
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my ranking is pretty much what Rex already said, except I have two "Tie" slots.
1. San Junipero [hands down]
2 [tie]. Men Against Fire [Very focused and on target, just smaller scale]
2 [tie]. Hated in the Nation [needs time to warm up but HUGE scale]
4 [tie]. Nose Dive [Very relevant and with a Main Point, but the plot was kind of uneven]
4 [tie]. Shut Up and Dance [Well-done and very plausible; but the point made was rather small]
6. Playtest
I felt like Playtest, while adequate, was notably below the rest of the pack.