I've looked through a lot of forum responses for this, and the docs and can't seem to find something that works.
I'm adding all the old Doctor Who serials to my server. They are serialized episodes.
For example, serial 1 is called "An Unearthly Child, and was released in 4 parts across 4 weeks, but they are all episode 1:
Doctor Who - s01e01 - pt1 - An Unearthly Child
Doctor Who - s01e01 - pt2 - The Cave of Skulls
Doctor Who - s01e01 - pt3 - The Forest of Fear
Doctor Who - s01e01 - pt4 - The Firemaker
The library sees episode 1, and it has a little badge with the number 4 on it, so it sees 4 parts. But it only plays part 1. All 4 parts are about 20 minutes long, so it should read it as 80 minutes long, but it only shows 20 minutes.
Any suggestions? They are all part of a single episode, released serially, with 4 different part names. If need be, I can join them all into a single file, but I would really love to preserve the serial nature of this as that's how it was released.