Season 1

Two brothers, Sam and Dean Winchester, witness their mother's paranormal death as children and grow up trained to fight by a distraught father who wants nothing more than to hunt down the thing that killed his wife. Sam escapes to college to start a new, normal life, but gets pulled back in after Dean shows up on his doorstep to tell him their father is missing. Following clues from their father's eerie phone message, the boys travel to a small town and encounter a violent and vengeful spirit called the "Woman in White."

Sam and Dean follow the coordinates left in their father's journal and land in the middle of the Colorado woods where they investigate the disappearance of several campers. The two brothers soon learn that they are dealing with a Wendigo, a creature made famous in Native American legends. A Wendigo is a former human whose cannibalism has transformed him into a creature with superhuman strength and speed.

In a small town in Wisconsin, Sam and Dean investigate a series of mysterious drownings officially explained as suicides. They discover that the spirit of an angry little boy with the power to travel through water is taking revenge on certain town inhabitants for a dark secret buried long ago. Dean forms a bond with another young boy who seems to have the power of premonition.

On TransNational flight 2485, a man possessed by the spirit of the Phantom Traveler causes the plane to crash, leaving only five survivors. Sam and Dean must exorcise the angry spirit before it attacks the survivors. The brothers realize the only way to vanquish the Phantom Traveler is to battle it on another flight.

In suburban Nebraska, several partying high school teens jokingly dare their friend Charlie to look into a mirror and repeat "Bloody Mary, Bloody Mary, Bloody Mary."

Sam and Dean help Sam's old college buddy after he is accused of a murder he swears he didn't commit. The brothers discover a shape-shifter is adopting the likenesses of others and murdering people. The brothers' race to stop the killing spree takes a terrifying turn when the shape-shifter morphs into the likeness of Dean.