Liam Neeson made one of the most interesting career transitions in recent memory when he introduced the role of former government agent Bryan Mills in “Taken.” Before the film, Neeson was an actor best-known for solid dramatic work in pictures that include “Schindler’s List” and “Michael Collins.” But, as Mills, he became an action hero of the Dirty Harry variety, dispensing swift, brutal street justice to the sex-trafficking European thugs who abducted his daughter.