Beverly recalls Picard not wanting her on the ship seven years ago. This is accurate (see Encounter at Farpoint (1987)). His reason is explained here.
Beverly reveals that Earth's World Government was created in 2150.
The first of two episodes this season written by Nick Sagan, son of the famous sci-fi author Carl Sagan, and future writer for Star Trek: Voyager (1995). The other TNG episode he wrote was Bloodlines (1994).
A close-up shot of the science stations on the bridge of the Enterprise is a stock shot from The Vengeance Factor (1989), as the "missing" Dr. Crusher can be seen reflected through the console's glass screen pressing controls.
This is the last episode of the series to feature Picard's jacket uniform variant. To that end, Picard is seen discarding the jacket in the cave.