what if I couldn't trust the veracity of my senses theme

We imagine what it would be like if the world our senses reported on became so peculiar that we had to question our own senses and even our sanity.

Examples

Sulu couldn't tell whether those were swirling knives out there in space while at the held or whether his eyes were tricking him in tos3x05 "And the Children Shall Lead".

22 total · 5 choice · 10 major · 7 minor

StoryLevelMotivation
tng4x05 choice Beverly :: Beverly in bubble universe
tng4x08 choice Riker :: Riker in Barash's simulated fantasy world
tng6x21 choice Riker :: Riker in insane asylum
tng7x11 choice Worf :: Worf was at a loss for how to explain all the changes from jump from one reality to the next
tng7x25-26 choice Picard :: Picard
blackmirror7x02 major Maria was left to second guess her own memories when Verity started secretly manipulating physical reality with the expressed purpose of making her appear bat shit crazy.
movie: eXistenZ (1999) major Allegra and Ted quickly ran into trouble distinguishing what was real from the goings on in the virtual reality game in which they were immersed.
movie: Videodrome (1983) major Max was subject to a series of increasing bizarre hallucinations, so much so that he lost the ability to distinguish his hallucinations from reality.
rd1988e6x01 major The crew couldn't tell what was real from the various Psiren telepathically mediated illusions they were being subjected to.
tng4x17 major hallucinations abounded owing to lack of REM sleep