Probably the best moment of the episode is the cold opening involving Jake accomplishing the "full bullpen" to Starship's "Nothing's Going To Stop Us Now". It has nothing to do with the actual episode, which is how a good Brooklyn Nine-Nine cold opening should be, but it's the type of goofy humor that this show excels at and these past two episodes have had more cold openings in vein of the first two seasons.
Overall, Skyfire Cycle is not the worst episode of Brooklyn Nine-Nine, far from it, but it's nothing special unlike the past 7 episodes of the season. It's packed with many great gags, involving a hilarious flashback about Ska, but at the end of the day, you could classify this as a filler episode with an interesting but not original A-plot and two mildly amusing side plots. It shouldn't be on the top of your list of episodes to watch, especially if you're a newcomer, but it does deserve a watch,
Thanks for reading my review of Brooklyn Nine-Nine. An all new episode airs Tuesday, December 6 at 8/7c on FOX.