How much will the spin-off then cross over with the flagship?
Get all the details from McKee below.
(Check out more first look photos and our Q&A with Jason Georgehere.)

Mitch Haaseth/ABC
We dont have a name.
You should see the bulletin board in my office.
We have hundreds of Post-its on it with possible names.

Mitch Haaseth/ABC
I heard a temporary name jokingly being thrown around on set isBlaze Anatomy.As a joke.
Plus, its an extension of the existingGreysAnatomyworld.
This way, we just get the chance to jump back into the rig with them and drive away.
It isnt the perfectly draped body in an OR.
Theres no safety net there.
Gosh, its so similar, too.
How much will the show actually cross over withGreys?
Will you lean more toward that?Well see.
I dont know yet.
We just finished shooting the pilot, so well see what the crossover potential is.
Theres so much, which is so great.
The worlds are so rich.
Because they coexist, we have the option to do it just a little or a lot.
Were open to all of those possibilities.
Theres just a tremendous amount of cross-pollination that could happen.
We have to treat them once they get into the hospital.
Were throwing every idea against the wall, and its like spaghetti, well see what sticks.
Plus, I know all the writers over atGreysand vice versa, so itll be a very symbiotic relationship.
There have been some pretty memorable patients onGreys, particularly the two conjoined by a pole.
Im writing that down.
Im going to the room after this.
[Laughs]
Ben Warren is moving from the flagship to the spin-off.
Hell be fundamental connective tissue.
Plus, we get to ride on firetrucks, which is everybodys dream.
I mean, dont you want to ride a firetruck?
So a lot of rain then?
Were actually shooting it right now.
Its going to be so good.
Hell definitely struggle and hell thrive.
Do you want to give fans some hope?I dont think anyone should feel hopeless.
Greys Anatomyis in season 14 and just hit its300th episode.
Im just geeked out.
Im basically a fan first and a writer second, and I just think its going to be fantastic.
Check out more first look photos and our Q&A with Jason Georgehere.