The pilot is the very first episode, the one that started it all, of course. We meet the Winchesters, a seemingly nice, loving family - Mom, Dad, and two kids, Sam and Dean. One night, the father falls asleep in front of the television, and awakes to his wife
murdered in his son’s bedroom.
Cut to the present day, and he’s hunting whatever killed her, and has raised his sons to be hunters too. The premise for the show was genuinely creepy, with a demon lurking in the shadows that they’re hunting down, and setting up the two brothers at odds about their lifestyle.