Arrow, Season 1

Merlyn:
It's done.

Moira:
And he won't be harmed?

Merlyn:
Nor will he ever discover your involvement; you have my word.

Moira:
Forgive me if I don't find that comforting.

Merlyn:
You were warned, Moira. I told you to get Walter under control, and you couldn't. Steps had to be taken.

Moira:
That's what you said to justify Robert's murder. And you wonder why I don't trust you.

Merlyn:
Quite a bit of judgment coming from a woman who had her son kidnapped and tortured.

Moira:
To prove to you that Oliver didn't know anything. And what does it matter now? What's done's done!

Merlyn:
No, Moira. It's just beginning. In six months, the organization's vision of what this city should be will be complete.

Moira:
And you won't feel a thing, will you? Thousands of innocent people will be dead and you'll feel nothing.

Merlyn:
That's not true. I'll feel a sense of accomplishment. And you'll have Walter back.