From the TV pilot to the Battle of the Bastards, take a deep dive into Westeros.
Five scripts are available here for Game of Thrones episodes.
They are:
Game of Thrones Pilot
Mother's Mercy - S05E10
Battle of the Bastards - S06E09
The Dragon and the Wolf - S07E07
The Iron Throne - S08E06
It's possible that one or more of these, or that of another episode, may have been available in the past.
The one I'd most like to read is Blackwater - S02E09. The writing for that is absolutely brilliant.
If you're a conlang enthusiast, there's something even in the dreaded series finale for you. The speech Daenerys gave near the beginning of the episode is given in segments (with English translations) in the original Dothraki and High Valyrian.
Certainly the finale script is a loyal copy of the original. Kit Harington or one of the other cast members accurately reported these final words on the script...
