Battlestar Galactica, Season 4

[After learning that the truth about Tigh being a Cylon, Adama is reduced to a sobbing wreck in his son's arms]

Lee Adama:
Okay. Dad, Dad, Dad, listen. No one suspected. No one. Not with his record, what he did on New Caprica. His eye, what happened to his wife... [tries to haul his father back to his feet] Come on, let's get up.

William Adama:
What have I done? All the people I've sent to die, for what? For what?

Lee:
For Earth.

Adama:
There is no Earth. It's a frakking joke. There is no Earth.

Lee:
Okay, Dad, listen to me. Listen to me! Pull it together.

Adama:
I can't.

Lee:
Yes you can!

Adama:
I can't... I can't kill him. I can't kill the bastard. I can't. I can't.

Lee:
Okay, Dad. It's gonna be okay. It's gonna be okay. I'll take care of it.