Everything we learned about Supernatural Season 13 and the Supernatural spinoff series Wayward Sisters at SDCC.

They also gave us some surprising insights into behind-the-scenes moments from previous seasons.

Here were the best moments…

The plight of Lucifers son.

Jacks origin causes a moral dilemma, being half mortal and half Lucifer.

To Dean, this creature means nothing but bad news.

I dont know why anyone would want to see how that works out.

Padalecki: Sams a bit like: That might just piss it off!'

Ackles: Well at least well know!

Social media shenanigans.

TheSupernaturalcrew has been known for pulling pranks on each other.

Padalecki and Misha Collins especially have continuously one-upped each other with pranks over the seasons.

He received one text from Matt Cohen (Young John Winchester) that simply stated: Dude.

Padalecki: Thats the last time I hand my phone over to Misha Collins.

And for the rest of the signing everyone was coming up to me like Ugh!

All this time and they still prank each other.

The fate of Mary Winchester.

Mary stepped into the apocalyptic alternate earth to become trapped with Lucifer at the end ofSupernaturalSeason 12.

Executive Producer Bob Singer gave some key but vague insights.

Dont be too worried about Marys demise though fans.

Spoiler Alert: Mom is not dead, said Singer.

Some people who have been long dead in our world are less dead there.

Confirmed returning are Missouri Moseley (the psychic from Season 1!)

and Sheriff Jody Mills.

These two will likely return together in the backdoor pilot forWayward Sisters(see below).

Jared and Jensen once switched Dean and Sams lines.

Most fans know that Jensen Ackles originally tried out to be Sam Winchester.

Well they actually did switch things up at one point, but it was lines in a scene.

Jared became too emotional during Croatoan.

Season 2 episode Croatoan showed a town wiped out by demonic plague.

The episode teased Sams demise when hes infected with the virus.

Padalecki: I was crying, crying way too hard.

Ackles: It was embarrassing, really.

Padalecki: But they werent Sams tears.

Bob [Singer] came up…hes like Hey that was a really great take.

I want you to take a minute and just dial it back a little bit.

Supernatural spinoff series Wayward Sisters.

Earlier seasons have tried spinoffs launching spinoffs ofSupernatural.

One was teased for Samuel Colt, which never got past gossip-level.

This time, things are progressing well for the seriesWayward Sisters.

Youll see Kim Rhodes returning as the fan-favorite Sheriff Jody Mills.

Brianna Buckmaster will also return as Sheriff Donna Hanscum.

Loretta Devine will even return as Missouri.

Expect to see a backdoor pilot toWayward Sistersduring Supernatural Season 13.Read more about the potential spinoff series here.

For more information on Supernatural Season 13, heres everything we know.

Read and download the fullDen of Geek SDCC Special Editionmagazine here!