Supergirl, Season 2

Lillian Luthor:
Supergirl. I don't believe we've been introduced.

Supergirl:
I've seen you before, in Lena Luthor's office. What were you doing there?

Lillian:
I might ask you the same. I don't like the idea of you around my daughter.

Supergirl:
You're Lillian Luthor. Lex and Lena's mother.

Lillian:
I'm a lot of things. A doctor, a patriot, a mother...

Supergirl:
A liar, a kidnapper, a killer. Does Lena know about Cadmus? Does she know who her mother really is?

Lillian:
And what are you to my daughter?

Supergirl:
I'm a friend.

Lillian:
I've heard that before. Years ago, Superman came to my son, Lex, and promised him the world. A new dawn for mankind. Lex believed him, poor thing. And then he watched as your kinsman infected this country with his propaganda, as his power became unchecked. And when Lex tried to take that power back, Superman convinced the world Lex was evil. My darling boy. My genius son. An actual superman, behind bars for life. Because you and your kind will stop at nothing to poison Earth.

Supergirl:
You're out of your mind.

Lillian:
We'll agree to disagree.

Supergirl:
So, what am I doing here?

Lillian:
I need something from you. I need you to be human for a little while. I know from your fight with Red Tornado when you expel enough of your heat vision, you deplete the solar radiation in your cells, leaving you as helpless as any mere mortal. I designed this helmet to absorb the radiation.

Supergirl:
You want me to solar flare? That's never gonna happen.

Lillian:
I can't hurt you. But I can hurt him. [shoots Mon-El in his leg]

Supergirl:
No! Mon-El!

Lillian:
Now we've been studying your friend. He's powerful, but has a very bad lead allergy. Say you'll do it and I'll let him live. Or I can just put one in his heart right now.