Denobulan Psychosis
As I was re-watching the Xindi arc recently I stumbled upon a nice bit of continuity. As the episode "Exile" begins it seems that Hoshi is hallucinating. Of course, we know she's not crazy. She's being contacted telepathically by an alien named Tarquin. Interestingly, Phlox tells her that for Denobulans, hallucinating is the sign of healthy mind - it's a healthy release for the subconscious. He muses that he wishes he could hallucinate rather than keeping things bottled up inside. Ten episodes later we have "Doctor's Orders" - which mostly consists of Phlox hallucinating while the rest of the crew is in a comatose state. It seems that he isn't keeping things bottled up so much anymore. Star Trek has never done a great job seeding story ideas early on and developing them at a later time. For example, Phlox' puffer-face-trick that comes out of nowhere in "Home," or like Daniels showing up like the proverbial Vulcan third eyelid. (If ...