TV lineups go through phases -- a rash of mafia dramas gives way to a new crop of dating shows, which are replaced mid-season by supernatural crime procedurals. The Next Big Thing? Nurses.

Witness three new series --TNT's "HawthoRNe," starring Jada Pinkett Smith; NBC's upcoming fall show "Mercy," with Michelle Trachtenberg; and Showtime's "Nurse Jackie," which marks the return of everyone's favorite, Edie Falco.

What's behind Tinseltown's new interest in this pink-collar profession? Here, some sociological theories.

1. We're scared.
Folks often don't have insurance. Those who do routinely get screwed by the faceless corporations in charge. Doctors, rushed for time and pressured to see a kajillion patients a day, can be jerks. Plus, we're depersonalized as a society, spending more time online and less with actual people.

What's missing from the health-care system is what's missing from our lives: being heard, being helped, a personal touch. Nurses can save us, right?

Sure, our RN fixation is misplaced and far-fetched, but unlikely alternate realities are a prime-time staple -- just look at sci-fi sensations like "Lost," "Battlestar Galactica" and "Sex and the City."

Click here to read more reasons after the jump.


2. Nursing is our new dream job.
Not because it's glamorous, mind you, but because in a crap economy, the fantasy of working in a growth industry becomes our escapist go-to.

3. We don't have to feel bad about it anymore.
Women used to be steered into "ladylike" jobs, such as teaching and nursing. Feminism taught us that girls can do anything -- and led to a generation that actively avoided those jobs (hence the nursing shortage as baby boomers get set to retire). Now that we're past that, women feel more liberated to become -- or watch -- anything they want: astronaut, president ... even, yes, nurse.

"We've processed those stereotypes for good and can now return to what's actually interesting about the job -- the work of healing rather than treating -- without feeling like we have to apologize for it," says Jacob Clifton, who recaps "Nurse Jackie" for Television Without Pity. "Contrast, for example, how oddly dated 'Ally McBeal' seems today: a woman lawyer? In a short skirt?!" adds Clifton.

4. There are already too many "Law & Orders."
"The nurse-TV trend is simply a new direction on an old theme. The cop/lawyer ideas are running thin, so they're heading to the hospital for entertainment," says MonkeyGirl, an ER nurse and the hilarious (and temporarily-on-hiatus) scribe at Musings of a Highly Trained Monkey. "And if it manages to get rid of the 'reality' shows, then I'm all for it."

5. Some of our best moms are nurses.