I was glad this show rebounded nicely from the dreadful last season, although I didn't realize this was going to be the last one. This didn't really feel like a series finale - I'm sure they made this season before that decision came down - but it was a decent end to a pretty satisfying season (with these mystery shows, rarely does the finale live up to expectations, but at least the overall season was intriguing enough). I thought all of the cast was great and was happy Ambrose wasn't making ridiculous decisions like he was in the back half of season 3. It's a shame his partner Sonya was basically written out halfway through, it seems they just had nothing for her to do. Would love to see Ambrose back at some point, maybe for a TV movie or something.