One criminal consultant. One consulting detective. One serial killer. And one perhaps inadvisable bet...

Arthur and Eames adopt a kid and raise that kid into Neal Caffrey

“You, upstairs,“ El said to Neal. He beamed, twirled on one foot, and trotted out. “And you need to stop making it so fun to mess with you,“ she added to Peter. She surprised a look of such melting fondness on his face as he looked after Neal that her breath caught. “No,“ he said quietly. “I really don't.“

Neal and Sherlock's rematch in London was the high point of the International Law Enforcement Conference -- until Neal's tracker went dark.

They haven't exactly met in linear order, Neal and the Doctor, but sometimes that makes for the best kind of friendship.