It's a fair cop, this somewhat minimalistic PWA is essentially just a mobile web site, but a) it has a facility to toggle whether you've viewed each episode or not (and remember this, at least on a single device), and b) it remembers with great comprehensiveness one of the stand out sagas in TV science fiction (in my opinion). Anyone else a B5 fan?
PS. The name 'lurker' comes from the nickname of drifters within the B5 world, I think!
Of course, you can turn this into an 'app' yourself with PAWA or just pin it 'as is' on your Start screen. Or just add it as a 'Favourite'. It's up to you. If you're confused by the different PWA options then check out my feature here.
Here's the PWA in action on my IDOL 4 Pro:
Diving down, from season (including movies and spin-off series) to episode to details...
You get an overview, production details, notes, goofs, scribbles from the creator/main writer, and more... Note the toggle at the top, to keep track of which ones you've watched. Very cool.