A visit to Vulcan finds Spock still lost
"Light and Shadows" is a connective-tissue piece-moving episode, rather than the more episodic-blended-with-serialized outing that has more typified season two. It’s significantly better than "Point of Light," despite being only a brisk 40 minutes long, because it takes time to breathe and deal with its characters and — well, it doesn’t have anything to do with the Klingons.
Connective tissue was what season one often lacked. Characters would drop off the map and then show up again under new circumstances, and it felt sometimes like we were missing entire episodes. Season two has been an improvement in this regard. "Light and Shadows" moves perhaps implausibly quickly in one regard: It moves Burnham from ship to planet to ship seemingly instantly.