Supernaturalstars preview Castiel's return and introduction to Jack

Last week, Dean Winchester got the one thing he needed: a win.

But what canSupernaturalfans expect now that Cas is back and meeting Jack for the first time?

Its kind of back to the same old same old, Jensen Ackles says.

As for Sam, Castiels return is most important in terms of what it means for Jack.

Sam is excited that Cas is here because Jack has a connection with Cas.

I dont know if thats because now Cas is kind of a father figure or trying to be.

He also continues to believe in Jack.

He thinks that he can be a force of good if properly nurtured.

So hes trying to do that.

Cas is an optimist.

Hes naive and foolish but hes an optimist.

Lets hope, this time around, his optimism doesnt come back to bite him.

Supernaturalairs Thursdays at 8 p.m.

ET on The CW.