DC Comics published “The Mirror Universe Saga,” set between the third and fourth Star Trek movies, in 1984 (IDW recently released a new collection of the fan-favorite storyline).

It’s one of those things you think about at 2 a.m. after a Twilight Zone marathon. Is there such a thing as a mirror universe, and, if there is, what would we see in the mirror? This goes beyond ...

The Mirror Universe breaks out into an all-out Mirror War in a new "Star Trek: The Next Generation" yearlong event launching Sept. 8, 2021 from IDW Publishing. Shown here, the cover of Mirror War ...