Secrets

After going through the seasons with my mom, I realized we are the omniscient viewers of Seasons 1-3. As I sat there and explained: "At this time Dean had not yet revealed to Sam what his father told him." I knew that if I had watched the show in real time I might have wondered and guessed about the secret whisper from John to Dean.

So what were the past secrets? What possible secrets are we in the dark about now?

Things we never knew at the time the season was unfolding:

Season 1

Sam was a psychic kid
Sam had visions
YED had plans for psychic kids
Dad knew this
There were generations of psychics

Season 2

Dad told Dean: “save him or kill him”
YED wanted one leader
YED had multiple generations
YED fed Sammy blood
Mommy knew demon
Sam had no idea what YED was after

Season 3

Mommy had family killed by YED
YED was Azazel who wanted Sam to lead and talked about it in hell
Sammy and Ruby had secret meetings
Sam knew there was Lillith
Sam knew mom’s friends were killed
Lillith held Dean’s contract
Evil wants Dean in hell

Season 4

Ruby and Sam have secret meetings
Sam does something naughty to power up
Castiel must follow Dean’s orders
The demons wanted to keep Dean in hell
Dean remembers and enjoyed 10 years of being a torturer in Hell
The angels have something for Dean to do


I always love this old question:

How many things exist because we believe in them?


My huge point of speculation, b/c I've noticed, not only do Sam's powers freak Dean out, but anytime demons or the powers are involoved Dean gets edgy, mean, and quarrelsome. And that's all it's been for almost every episode this season.

Is Dean’s tension with Sam due to all those horrible things he heard about him in Hell?

What are the other secrets we as an audience have not yet had revealed to us?