This was a lot harder than I thought it would be.
Homicide: Life on the Streets - Have a Conscience
Reed Diamond and Clark Johnson really shined in this episodes as friends and partners. It was also gutsy of the writers to dedicate almost half the episode to just the two characters talking in a single location, one trying to talk the other down from a suicide attempt. It's the kind of episode that leaves you emotionally drained at the end even though nothing bad happens. Season 5 was definitely one of the strongest of the series.
Twin Peaks: The Return - Part 8
I have a feeling this episode is going to end up on a lot of "best of" lists for 2017, and for good reason. It is utterly unique in the TV landscape and I'm still trying to wrap my head around the fact that it was actually aired. Bold, creative, and completely unforgettable, in a series where that is the rule rather than the exception.
Community - Mixology Certification
I had to struggle between this episode and Modern Warfare. The latter is more fun to watch and was the one that really elevated the show from an above average network TV sitcom to a modern day cult classic in my eyes, however Mixology Certification was the first episode that really delivered an emotional gut punch and leaves you feeling bittersweet. That's a very ballsy move for a show known for being quirky fun, and really showcases the talent of the writers and the actors for being able to pull it off.
Red Dwarf - Marooned
Another show where I struggled between various episodes. Series 1 and 2 were so unique for what they were, and while I do find them enjoyable, I did like the show a lot more when each episode wasn't just a bottle episode. Which is why I find it so ironic that out of the newer (i.e. post series 2 when the show actually had what could be considered a budget), my favorite episode is a bottle episode. This one seems to have a good blend of humor and drama as you really can feel the sense of urgency and hopelessness in Lister. It's also the episode where Rimmer gets a slight moral high ground to Lister after what Lister did to Rimmer's fancy wooden locker box.
Gravity Falls - Soos and the Real Girl
Awkward nerds trying to flirt is my favorite sub category of the romantic comedy drama, and when you have a writing team as good as the one for Gravity Falls you get pure gold in cringe inducing hilarity. It was also a good way of fleshing out Soos' backstory about being a man child trying to grow into adulthood. There were also a lot of great visual gags in the mall.