The fifth and final season will find Captain Burnham and the crew of the U.S.S. Discovery uncovering a mystery that will send them on an epic adventure across the galaxy to find an ancient power
Gosh, I really wish Discovery would stop doing the same galaxy-saving mystery season arcs. It was tiring several seasons ago, and it's still tiring now.
But why? I don't see a storyline connection/similarly between this episode and "The Inner Light".
I think the episode is just about Mariner's inner fight about being in Starfleet, and the similarity in title is just coincidental.