When John Winchester goes missing, Dean goes to Stanford to enlist the help of the brother he hasn't spoken to for a couple of years. After spending an unsuccessful weekend trying to track down John, Sam returns to Stanford, despite Dean's obvious desire for him to stay. Sam's commitment to returning to shaken when his girlfriend, Jessica Moore is killed in the same manner as their mother. Sam joins Dean, and they go on the road with the aim of finding their father and killing monsters along the way. In particular, they are after the demon that killed Jess and Mary Winchester.
In season one, it is obvious that Dean is happy with his life as a hunter, and he tries to draw Sam back into the life: "Saving people; hunting things. The family business." To some extent, Dean sees himself as a soldier, and his father as his commander. Gradually, Sam and Dean become reacquainted with each other after their long separation – and often clash. In 1.06 Skin, the shapeshifter reveals Dean's anger at Sam going to college, while he had to stay and look after their father. He states that he knows eventually everyone will leave him. They clash over Dean's loyalty and obedience to John. In 1.09 Home, Dean first becomes aware of Sam's psychic abilities,
…show more content…
The Winchesters manage to acquire it from a group of vampires. The Yellow-Eyed Demon and his "children" Meg and Tom are quick to act, and begin killing John's friends and threatening to kill more until John gives them the Colt. John tries to trick them and is captured. In the season finale, the two Winchester brothers must rescue their father and face the Yellow-Eyed Demon, who possesses John. It is Dean who senses that something is wrong, when his father, uncharacteristically, praises him. Azazel is able to hold the brothers in check with his powers, and begins to torture Dean. The demon taunts