Persistence of Vision - A telepathic attack on the ship that originally feels like a "Is the Captain going nuts" episode. I liked it. It moved things along nicely. Kes' powers get another outing, and the Captain's willpower to be not only the first effected, but then the last to succumb barring Kes' abilities, was pretty damn cool moment for the character.
Not too keen on the "Was I even here ending?" though. Though the fact they're all left reeling from the effects is a start.