Yes, I do want Summer to come back. Not this season perhaps, but a year away getting her act together and returning would be a wonderful side story arc. Just because she was a prostitute doesn't mean she can't grow as a person and come back to the show. She had already started in the right direction you may recall, calling her job as a CI her "first grown up job." Are you saying no one who has ever gone down a bad path can ever be redeemed? Come on.
As to Lisbon's old boyfriend... Meh. She can do way better. Which was the point :-)
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