One other thing. You don't need to insert categories "Upcoming episodes", "Articles that need a picture", "Television episodes", and "Episode stubs" when creating episode pages. They insert automatically when you insert the inforbox, and the Upcoming/need image/stub notices.
If you've got a YouTube account, there is one or two ways of take screenshots directly from YouTube without downloading the video, "prt sc" the whole screen, or cropping the picture yourself. The video below shows two ways of doing it. If you use Chrome, the first method would be the best choice.