This was a core shift in the character of Bashir. Now, one rewatches the early seasons and retroactively has to view him ...

Commander Worf (Michael Dorn). In the episode, a race of aliens bring the fantasies of the DS9 crew to life, which proves embarrassing for Dr. Julian Bashir (Alexander Siddig) and Jadzia Dax.

In one of two appearances on this list, a major reveal about Julian Bashir rocked Deep Space Nine through to its core. Here, the revelation that Bashir had, in fact, been replaced by a Changeling ...