Is your feature request related to a problem? Please describe.
Currently it is only possible to request entire seasons. This can present a problem as some seasons can have a very large amount of episodes. Being able to have more granular control of what can be requested could cut down on the amount of items that are being downloaded and prevent seasons with massive amount of episodes to be requested. A good example would be, a user wants to try out an old show. They can just request a few episodes to see if they like it.

Describe the solution you'd like
Be able to request individual episodes.

Describe alternatives you've considered
N/A

Additional context
Other examples that would benefit from this feature:
#349