10 Biggest WTF Moments From Star Trek: Voyager

Before The Doctor got his mobile emitter, he was only able to travel to parts of the ship with holographic projectors, mainly sickbay and the holodecks. In the episode Persistence Of Vision, the crew tried installing holo emitters in other areas of the ship, like engineering, but they ran into some problems, and The Doctor got shrunk when they transferred his program out of sickbay.

Janeway played a gothic holo-novel program to deal with her stress, but afterwards she started witnessing elements from that program throughout the ship in the real world. It started with a cucumber sandwich and a fancy cup from the program appearing in sickbay, but Janeway soon started seeing characters and hearing voices as well. She became convinced that the new holographic systems were projecting holograms throughout the ship, but when she asked Neelix about the sandwiches and the cup, he explained that they were actually fried murt cakes and a simple metal cup. It became clear that the others couldn't see what the captain was seeing.

The most shocking moment was when Janeway heard the voice of her fiancé, Mark, in her quarters, who was mad at the captain for leaving him for a holographic lover. Until this point, we were made to believe that these were holograms, but Mark's appearance made it clear that something was actually wrong with Janeway's mind.

As things progressed, the rest of the crew began experiencing similar visions (Tuvok, of his life on Vulcan, and Paris, of his judgemental father, for example), and they learned that a powerful telepathic alien species was causing the hallucinations to weaken the crew. The other hallucinations, particularly Kes's vision of Neelix at the end of the episode, were truly horrific as well, but Mark's appearance in Janeway's quarters was when we discovered that these visions were not merely holograms, and things really started to turn disturbing from there.