HOW COULD I POSSIBLY ANSWER THIS QUESTION!!! there are so many good episodes, all of them weird & wonderful & full to the brim with canon-typical derision for common decency, respect, and human dignity.
but here are some of my favorites.
episode 1, which is excessively bizarre if you haven’t watched the rest of the series and an excellent primer on the weird genre mix that is gintama, and just very amusing if you have watched it. an excellent use of 40 minutes’ time.
episode 5, because the yorozuya trio manage to get caught up with an anti-government radical rebel faction’s terrorism plan and the police, while having nothing to do with either one of these groups
episode 45, where the yorozuya’s giant dog becomes even more of a giant dog, turns into a demon, and goes on a rampage across the city. so much property destruction, so much slapstick comedy, i think i cried actual tears while watching it once.
the entire yagyuu kyuubei introduction arc, for TOO MANY REASONS TO COUNT. kagura and sougo’s rivalry getting in the way of everything; hijikata’s unfortunate burden; and oh my god the psychological bathroom showdown. the conclusion, too, was amazing. also, yagyuu kyuubei. thank you gintama. thank you
the first three minutes of episode 94 are a blessing. if you never watch anything else from gintama, at least please watch this. i promise you won’t regret it. if you’re new to gintama though don’t bother watching the rest of it. it won’t make any sense.
not that gintama ever makes sense, but its lack of sense would make even less sense if you didn’t know how much sense it didn’t make
ryokan arc: otose sends the yorozuya trio, plus otae, to a haunted hotel. oh, the shenanigans.
popularity poll arc: in a typical display of contempt for the fourth wall, the gintama cast finds out the results of the most recent popularity poll… and proceed to fight about their rankings. i would watch this purely for episode 183′s opening and changes in style. it is so great.
episode 202 and the following episode 203: shinpachi returns from gintama’s 1 year hiatus to find that everyone else has completely changed their characters – and at risk of a copyright lawsuit too! – and they think two years have passed, not one. what in the world could be going on?!
episode 231: the gintama cast attend a funeral for a restaurant owner. the restaurant owner’s ghost appears. please, watch this. i love this episode.
episode 266: gintoki accidentally stops time in edo. please watch this episode????
there are many other great episodes with great moments but these are… my favorites