Question about Netflix & how the rental service works for certain items.

I’m considering using Netflix, I have a very simple question about Netflix rentals… I know they do the 1, 2, or 3 discs out at a time, each with varying prices. What if I want to rent a tv show season dvd? For example- Friends Season 1, is 4 discs. If I sign up for the 1 disc at a time plan, would this mean I can only rent out 1 disc at a time from that season? Or would the entire first season be considered a 1 item/1 disc rental? I don’t want to have to wait for each disc to be sent back & forth, making it take over a week to watch one season of a show. -Thanks.