"You call it in," he says, looking at Hermione and then Kate in turn. "I'm serious. No matter what you think you can accomplish on your own, you always call for backup and you always make sure that someone knows the situation at hand. Never take the hostage with you. If you want to pursue on foot, your partner has to be aware and they should call it in to whatever head office you're working for. The safety of your person, your partner, and your hostage matters more than the suspect. They inevitably screw up again or a witness comes forward. Generally, criminals? Not that smart. Supervillains don't really come around that often."

"And, even if you do have a couple of genius criminals on your hands, there is always some way they slip up. Always. And it's usually something wholly minor, like something they bought or someone they pissed off," he advises, tucking the water gun into the back of his jeans. "Backup," he reiterates. "Love the word."