Upload a script that hasn't aired yet. Three reviewers read it against the full story so far:
The superfan who has seen every episode and catches every slip
The showrunner who knows the whole lore and pitches creative ways to fix things and pay threads off
The first-time viewer who knows nothing and says what would confuse them
Each script is checked against everything that has aired plus every script queued to air before it,
so put in the planned air date. You get back what contradicts the story, what's been forgotten, which open threads are still unpaid,
and what could confuse someone new, each with a suggested fix.