Well, I can't prove it because I didn't post about it, but I did have a feeling it could be Cooper at the very end, because of what Ben said about if you want something bad enough, it comes out of the box.

Seemed to me he'd want the most to get even with "Dad".

In spite of this, I still yelled "WHAT!!!" at my t.v.

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“Because, in a land of predators, the lion never fears the Jackal.” – Dexter S3E03 “The Lion Sleeps Tonight”