WARNING: This story contains major spoilers from the season 4 premiere ofThe Flash.
Read at your own risk!
Caitlin Snow returned to the team during Tuesdays season premiere ofThe Flash but so did Killer Frost.

Katie Yu/The CW
Thats because, as viewers then discovered in Tuesdays premiere, shes actually both.
While Caitlin seems to be back to normal, shes torn between the two in a split personality-like way.
This year is a little bit different because now some time has passed.
Is she successful at that?
Shes trying to deal with things herself, Panabaker says.
That will prove difficult as Caitlins past catches up with her.
Caitlin is struggling and attempting to separate herself from Amunet, Panabaker says.
Obviously Killer Frost is an incredible tool and an incredible ally to have.
Shes very powerful, so I dont think Amunet wants to let her go.
Were going to start [to see that].
The Flashairs Tuesdays at 8 p.m.
ET on The CW.