I'll try to post these every other week day (Mon-Wed-Fri), but I make no guarantees. Sometimes there will be more than one cap for a beginning or ending of an episode. I'm also using my capper's discretion - meaning I'm choosing the most aesthetically pleasing image that we see first or last not always literally the first or last things we see. I'll explain this as we go along.
:: Click on images for the HQ versions ::
4.04 Beginning: Our awesome first look at the episode is of this devil's trap done with metal and chains suspended from the ceiling.
Sam & Ruby interrogating a demon about the whereabouts of Lilith. The demon isn't cooperative though and Sam uses his powers to pull the demon from the man.
4.04 Ending: By episode's end the boys are in the car and Sam says he's done using his powers..."it's playing with fire. I'm done with them." Dean is relieved to hear this.