Lost, Season 6

[Jack has entered the back of the church in the sideways world. He finds his father's coffin inside. Upon touching it the memories of his life on the Island come rushing back. He then opens the coffin and finds it is empty; he closes it disappointed]

Christian Shephard:
Hey, kiddo.

Jack Shephard:
[Shocked] Dad?

Christian Shephard:
Hello, Jack.

Jack Shephard:
...I don't understand. You died.

Christian Shephard:
Yeah, I did.

Jack Shephard:
Then how are you here right now?

Christian Shephard:
How are you here?

Jack Shephard:
[beat] I died too.

Christian Shephard:
[They hug as Jack becomes wracked with emotion] It's ok, it's ok, son. It's ok.

Jack Shephard:
I love you, dad.

Christian Shephard:
I love you too.

Jack Shephard:
Are you...are you real?

Christian Shephard:
[Laughs] I sure hope so. I'm real, you're real, everything that happened to you is real. The people in that church, they're real.

Jack Shephard:
And everyone else, they're all dead too?

Christian Shephard:
Everyone dies sometime, kiddo. Some before you, some long after you.

Jack Shephard:
Are they all here now?

Christian Shephard:
Well, there is no 'now' here.

Jack Shephard:
Where are we, dad?

Christian Shephard:
This is the place that you all made together so that you could find one another. The most important part of your life was the time that you spent with these people. That's why all of you are here. Nobody does it alone, Jack. You needed all of them and they needed you.

Jack Shephard:
For what?

Christian Shephard:
To remember and let go.

Jack Shephard:
Kate. She said we were leaving.

Christian Shephard:
Not leaving, no. Moving on.