Jack Ryan, season 4. I enjoyed the first three seasons of this show, despite largely feeling like Krasinski is trying to fit into a mold he does not. Though, he does a good job with that in mind. That persona isn't him, but he sure makes an effort at trying to make it work.
Unfortunately, the fourth season is a mess. It ends strongly, but the first half of the season is barely watchable, and that's problematic for a six-episode run. There are three concurrent plots happening that eventually converge, but their independent appeal before that point is little. The structure of the story could have done with a couple extra rounds of work. 5.5/10, perhaps.