Multi-part episode handling

[badgerrando]

I have a few collections of shows where the IMDB/TVdb data suggests that there are only three episodes of a show per season, but in fact each episode was aired in two parts, so that there are actually six files. This is pretty common with Masterpiece shows, for example.

I would prefer not to have to splice the video files together myself.

Things I have tried:
- Naming the files like so:

• [Show] - S01E01E01 for episode 1, part 2
  
• [Show] - S01E01E02 for episode 1, part 2
  

This creates a weird output that puts a 1-1, 1-2 in front of the episode title and also doesn't gracefully sort the episodes, no matter how many times I edit and refresh the metadata trying to sort it properly. When I tried it with a few episodes, Episode 1 parts 1 and 2 displayed in the proper order in the season list, but part 2 of episode 2 displayed before part 1 of episode 2 no matter what I tried.

Then I tried naming the files like so:

• [Show] - S01E01 Part 1
  
• [Show] - S01E01 Part 2
  

This results in Jellyfin only showing each episode once, without "parts". If I click play while watching in a browser, it will play part 1; if I let it keep going at the end of the episode, it will then continue with part 2. But there is no way to manually select part 2. And on AppleTV using the Infuse player, it just stops after playing part 1 and there is no way to play part 2 at all.

Not sure what else to try here. Would appreciate help!