Module watch 

Structs

EpisodeKey

Episode identity independent of files

NextEpisode

Description of the next episode to play

SeasonKey

Season identity independent of files

SeasonWatchStatus

Aggregated season watch status

SeriesWatchStatus

Aggregated series watch status with next-episode hint

Enums

EpisodeStatus

Per-episode watch status

NextReason

Reason chosen for the next episode pick