Saru considers wielding truth over lies, life over death
“The Sound of Thunder” is probably the most riveting episode of Discovery yet (and was well on its way to an elusive four-star rating) for its first three acts — before it then rushes through a final act of overheated drama that has some considerable problems. Overall, this is still a very strong and satisfying hour of this series that ends with a major change in the status quo for two entire species. But the shortcuts and missed opportunities on the way to the conclusion take some bloom off the rose.
For the most part, this is an episode that has the necessary elements, weight, and established backstory to stand alone and work on its own merits. But the episode also tries to tie this standalone story into the Big Serial Arc of the season involving the Red Angel, while incrementally moving that arc forward. While I think tying your serial arc into individual standalone stories is the right way to do a season-long arc (as opposed to the “10-hour movie” that leads to lots of narrative drag), the way they do it here proves to be one piece too many.