Normally I try to make the first capture in the slideshow something that doesn't really spoil things too much or spoil anything at all. Unfortunately, though, from time to time something comes up that needs to be showcased in the slideshow because it's such an important moment in an episode - and that's the case with that capture of Jason. But I make every effort not to spoil things too much whenever possible.
But on the other hand, anyone who checks out the subsequent captures/captions in the slideshow does so at their own risk, which is one of the reasons I specifically pointed that out when I first announced the slideshows and I made it possible for the "History" box in the forum's header to be collapsed in the "Variations on Blue" theme and suggested that anyone who didn't want anything to be spoiled for them should use that theme rather than "Blood Red."