Mariner and Captain Freeman's constant arguing comes to a head but instead of throwing Mariner in the brig for subordination, Freeman makes her take mandatory therapy. Mariner thinks it's worthless, but decides she can *really* work through some stuff when Boimler reveals a holodeck program with complete personality work ups for the whole crew.
Only... Mariner may not realize quite how much work she needs to do on herself before it's too late...