Board Thread:Spoilers!/@comment-26443838-20160203031256/@comment-4453062-20160212000709

Eskaver wrote: CoolDudeAl wrote: 8Rob wrote: Eskaver wrote: Nope. There's 5x20, 21, 22, and 23. Oh... I didn't know about 5x23 Still, even with that, they do seem to be filming pretty quick. They should definitly be done filming by the first of April, if not before then. Well, it's not like they needed 25 weeks to film and it'll give people (the cast and crew) a break.

They made up the difference by filming 508 and 509 at the same time, too.