And you defintely don't need to explain to me what the difference is.
The fact remain that the head writer and the supervisor of the series aren't just "someone".
You won't have any more luck in determine if it was written in a episode script or some special series plan,or if it was just an idea Ian an Dean were toying with.
And at the end, it makes zero difference, becasue there aren't any more scripts or written plans, it all boils down to what Ian adn Dean had in mind, call it proposal or plans, it won't make ANY difference now.
You're just beating a dead horse.
If you want to know more, please ask Ian and Dean, because that's all we can tell you.