In the movies, he’s pretty much an indiscriminate and blunt instrument, as M would put it. While he’s not necessarily a mass murderer, per se, he demonstrates no qualms about killing anyone, and even makes quips about it.

In the books, though, it’s the total opposite. While as a Double-O he has a license to kill, he states outright that he doesn’t like killing people and only does it if he has to. It’s a part of the job, that he does, but it’s not his ideal situation, and he’d rather not be put in that place to take someone’s life.