Screen Rant

The Mirror Mirror episode of Star Trek TOS was retconned in season 2 of Star Trek: Discovery. 1 / 7

Discovery introduced the young version of Spock, who had earlier knowledge of the Mirror Universe... 2 / 7

But this was presented as something that he used his mind to discover in the TOS episode. 3 / 7

Watching the episode now, the context is completely different in light of this... 4 / 7

With Spock having navigated the situation with the Mirror Universe, rather than adapting to new circumstances. 5 / 7

Watching Discovery, it's now clear that Spock knew more than he was letting on... 6 / 7

And he kept this knowledge a secret. 7 / 7