Part of what makes Jenna's performance so powerful is her incredible artistic preparation. You've heard the legends of her intensive study of medieval jousting, the 60 pounds she gained to play Elizabeth Taylor, the weeks spent in a box with David Blaine to prep for her one-woman Houdini show.
Those newfound skills don't always have a life after the project is over. But when it came to playing beautiful but brainy cop Alexis Goodlooking (TVBlogmeister called it "gut-wrenching and brutal"), Jenna developed an expertise that she'll always use: crime fighting.
In prepping for the series pilot, Jenna immersed herself with real-life street cops, patrolling the alleys, going on undercover assignments to strip clubs and singing at a wake at the Irish Cultural Center. But it was her time spent with the crime scene unit that gave Jenna a new appreciation for the hidden world of crime. As the criminalists schooled her, tiny details can reveal everything. Few people know, for example, that dental floss DNA can be cloned to make a living copy of the person who used it. Or that rigor mortis can be reversed with a hair dryer. Or that most criminals are left-handed.
Such knowledge might seem esoteric to the layman, but to Jenna, it's information to be used in everyday life - like finding the alcoholic thief who stole a beloved showrunner's bottle of scotch, for example. Jenna's solving The Case of the Missing Whisky didn't bring back Pete's beloved booze, but it did put the staff on notice that no small crime will go undetected. It's just one of the many benefits of the actor's life: the skills learned on the job become just another incredible aspect of who you are.