Ok, we are all talking about how this season could end ... and we are all saying that it will end with them finding this thing that killed their mom and Jess. ... and how it could go on in Season two then ...
BUT ... what if they just THINK that what they killed is that thing?? They will think they killed it and then ... another woman dies like that ... their uncles wife, whoever would be blonde and involved with the Winchesters ... and then they realize that it's not over yet ...
And it starts again ... looking for hints, looking for that killer ...
I mean, why not? they could make Sam, Dean and John look for that thing until the show's end ...
Or at least for one more Season (after the first seaosn the "oh damn, and we already thought we killed it" thingy would get boring ...)
You know, they know what they wanna find ... but maybe they can't get the easiest clues ... because they wanna find it so badly and are so scared of it ... so maybe their subconscious makes them miss things ...
(ok, we are oficially crazy
)