Travelling to alternative realities is a trip down the rabbit hole. No wonder then that one of the first known ways to cross over was called The Warren.
“Have you been to many dimensions?” Jackie asked.
“They are not dimensions,” said one of the Docs. “Up and down, left and right, in and out – those are dimensions but th-”
“No one likes a no-it-all,” said Jackie.
This is an incomplete guide, a hitch-hikers guide if you will, to the infinite complexities that tie together more stories than can ever be told. Also, it is really cool (if you like to read additional mythology).