I still don’t get why Callen & Co. trusted The Chameleon in the NCIS: LA finale. Didn’t they know he might betray them? — Justin
ADAM: Executive producer Shane Brennan acknowledges that sending The Chameleon to negotiate with Sidorov about the nuclear weapons was a calculated risk. “Give him an inch, and he will take everything that you possess — they were aware of that,” he says. “But there was only one person who could pull this off. It was something they had to do.” Either way, Callen won’t take the betrayal lightly. “Callen knows that there will be a final confrontation, and only one of them will walk away,” Brennan teases. Gee, I wonder who?
Source: TV Guide