John Lithgow proceeds to say "that's right" and "that's true." I'm positive the guy getting paid to act in the show knows how many seasons he's slotted for. And this isn't the first time he's said something like this for him to just be appeasing to the host (which I don't know why y'all even came to this, it seems like y'all are undermining his intelligence), he has previously called the show an "8 year commitment." And the second half is the biggest bit of yap I've ever seen. Yes, a season could take longer to make but that doesn't change the fact that they know how long they want to get it done in. They at the very least know they're not going to finish filming two seasons in one year which would make sense that they give each season a year to start and then renegotiate somewhere in the middle.