Season pass for Tales from the Borderlands

If i purchase the season pass for tales from the borderlands do i get the episodes free or do i still have to purchase them just discounted?? 

I got episode 1 free from amazon and i played it today and quite enjoyed it, I'm wondering if i buy the season pass if i would get the other episodes as a package 

Thank you 

and if yes that i get all episodes 2-5 once i buy the season pass should i buy the season pass from xbl for $14.99 or is there another site that has it cheaper?

You buy the season pass then you can download all the episodes for free. That's how telltale games works.