Probably the best use of the amnesia plot device I’ve ever seen.
There are a lot of great fun moments in the episode: Worf assuming (literally) command, Riker and Ro hooking up, Picard when he thinks he’s not in charge. But there’s also a great ‘WTF’ with MacDuff hanging around the bridge, and a clever use of audience’s knowledge to build tension in the plot.
The payoff is a little too brief, and the ‘reset button’ for what’s gone on in the episode a bit more blatant than usual (oops, sorry we killed those people, really really sorry). Overall though a very good episode.
222 down, 515 to go.