spoilers follow.
Good continuation of the cliffhanger they had, with a satisfactory hopeful neding. In light of the appearance of characters in ep. 2, I am pretty sure it was filmed with season 2, and held in the can (reasonable -- they would have had the sets and the team in place).
Trelane from TOS is explicitly made a child of Q (John de Lancie with a cameo voice appearance, though not named), and appears here doing mischief. I liked that everyone describes the character as being of different species, and no one notices the inconsistency. Chappel's fella is roguishly endearing, but a little too ideal, and he absolutely should not be dating someone who he is supervising in a fellowship. Unethical academic, even with his 241 papers.