- Before and After (Season 3, Episode 21)
- Year of Hell Part I (Season 4, Episode 8)
By Star Trek time, that could very well be around 6 months between the two. Plenty of time for Annorax to have been fooling around with the timeline, without Voyager's knowledge. (Any changes to the timeline, will invariably effect Voyager as well) No mention of Kes, or her preemptive warnings about the Krenim were made during the Year of Hell episode(s). For all we know, Voyager could've been living out a timeline in which Kes never existed. Atleast, until Janeway collided with the timeship, and reset the timeline.