What happenend on last episode of Supernatural?

Question

If u watch supernatural please tell me what the secret was that Dean's father told Dean about Sam and the children like him.

Answer 1

Dean told Sam that John had said for him to look after Sam and if he has to, to kill Sam. John basically wants Dean to save Sam (so it doesn't come to killing). This girl Ava has a vision of Sam going into a house and setting off a trick wire and then blowing up...so she tracks down Sam, who stole a car and ran off without Dean knowing, and she tells him what she saw. She also tells him about a vision she had of a guy getting stabbed in a parking lot and then finds out it actually happens days later (and you find out Gordon killed him). Gordon comes back trying to kill Sam...Ellen calls Dean and tells him where Sam is headed and as Gordon is shooting at Sam, Dean stops Gordon from killing him. But Gordon knocks Dean out and takes him to a house and ties him up. Sam calls Dean and while Gordon holds the phone to Dean's ear, Dean mentions how it's a "funkytown" which is code for "someone holding a gun on him" so Sam knows Dean is in trouble. Sam decides to go save Dean despite what Ava told him about seeing him die. Gordon sets up 2 explosives incase Sam gets around the first one. Sam ends up missing both and then holds a gun on Gordon. After they fight, Sam knocks him out and then unties Dean. They leave but Dean wants to kill Gordon for sure this time but Sam tells him not to worry about it. As they leave, Gordon comes out of the house and tries to shoot him, but Dean and Sam hide just as police show up (Sam tipped them off)...so they take Gordon away. Sam tries to call Ava and let her know he is fine but gets no answer. He feels something's wrong so he has Dean drive over to her place. When they get there, they find her fiance murdered and then Sam finds Ava's engagement ring on the ground. We don't know if Ava was taken by the demon (they found sulfur so they know the demon was there) so whether Ava was the demon.