It doesn't make sense that Pelant gets away at the end... and that every episode following this episode no one brings up Pelant again. It's as if all that just happened and the characters pretended that it didn't ever happen... Not to be obsessive or anything, but usually when a character like Pelant doesn't die or ends up being convicted (especially after seeing him kill a Veterinarian, you'd think their would be some follow thru at least mentioning him. They gave up on pursuing Pelant too easily. The tipping point for me was when Booth shot Pelant and didn't think to call someone else to go after him as that would be an obvious giveaway when pursuing someone like that. It's not like he was going on a plane and flying back to Egypt.
They should have wrapped up Pelant's pursuit and moved on. There's always someone who is smarter and more evil than Pelant that could make for good writing. Don't save him till the end.