The native Favorites List in Kodi does just fine for that. On the link that you access your show, bring up the context menu (either menu, "c", or right click) and you see "add to favourites". You access the favorite via the "star" in Kodi's main page, depending on the skin.
If you want to create different lists of favorites, look into "Super Favourites" where you can move that favorite selection into a different list, kind of a custom add-on, if you will.