I agree with your gaming categorisation, but I see the tv thing more like this:
full=4 hour tvmovie
seasonal=long christmas special
episodic=a tvshow (running a season or more)
sequel=tvmovie, part 2, return of tvmovie!
expansion=nothing like this exists in the tv world.
But I think this comparison is flawed anyway; tv/film!=games. And things like GW:Factions blur the line, as it's kinda expansion, but it's standalone so could be classed sequel, or even episodic cause they plan on releasing two each year. MMO's have episodic expansions too, and if they're released on a schedule you could even call them seasonal.