VOY - Endgame
The ending with the nearest aperture leading to the Delta Quadrant, how the ship ended up "right where we expected to be" (wtf?) and Voyager ending up inside the Sphere... was so badly put together it's no wonder I had no idea what was going on the first time I saw it. Terrible editing and two minutes less of Chakotay and 7 could have been put at the end where it badly needed it.
Krige though was once again excellent as the Queen, a welcome return. Decent finale, but nowhere near as good as AGT and WYLB