But even they need help, and thats where technology comes in.
So what happens when something invisible attacks the system that our stalwarts are so reliant upon?
Such was the frenetic premise of tonights winter finale.

Credit: Richard Cartwright/ABC
She tells the interviewer shed like to win three Harper Averys, just to piss off her mother.
So maybe Meredith hasnt grown as much as we thought.
Bailey is trying to convince Webber to initiate the multimillion-dollar contest that Jackson is anonymously backing.
Jos first act as chief resident is to assign the interns to surgeons.
Maggie and Jackson are dealing with Claude, an older man who has lung congestion.
Her mother left Claude when she was pregnant, and her recent funeral reunited them.
He tells her that its just fun.
Theyre interrupted by Aprils elderly patient flatlining.
All the monitors are going crazy and Owen and April are stuck frantically trying to calm everyone down.
Currently we control your hospital.
We own your servers.
We own your systems.
We own your patients medical records.
Obviously everyone is scared, and unfortunately everyone directs their frustration at Bailey.
She, in turn, turns on Tim and says, I thought we were prepared for this.
I thought we had a cyber-security seminar!
I think people will know, Webber astutely says as they all watch the agents set up shop.
Webber, meanwhile, is in his old-school element.
This catastrophe gives the OG a chance to shine.
IT Tim tells him that translates to $20 million.
The FBI tells Bailey that normally these hackers ask for an amount they think you could handle.
Carina unsurprisingly cant calm the woman down, even with all her oh-so-helpful orgasm suggestions.
In a Clear-Eyes-Full-Hearts-esque speech, Arizona convinces her to push, and holy Coach Taylor, does she ever.
After releasing a primordial scream, the woman delivers her baby while standing, no less!
She really likes you, and I know shell be safe, Frankie says.
Jo is running down nurses throughout the hospital to find out, as Frankies time is clearly running out.
Maggie and Jackson decide that Claude needs to be transferred.
As theyre in the helicopter, Jackson says he cant believe he didnt notice her.
She assures him that he wouldnt have noticed her back then.
Before their flirtation can continue, blood starts spurting everywhere.
The turbulence has caused Claudes tube to come loose.
He tells Bailey they need to start evacuating patients.
Bailey informs him that their time is up and that she cant be worried about hypothetical patients.
She says shes calling Aretha to get the money.
But Aretha is otherwise occupied in the helicopter from hell.
The last we see is his blood-covered cell phone ringing.
Realizing she will likely not make it, she tries texting Alex but it wont go through.
Oh, wait, its Jo now, right?
As was clearly the theme in this episode: Some disasters you just dont see coming.