Hank and Supergirl in “Unfinished Business”

Hank

[after putting Kryptonite restraints on Supergirl] I'm sorry. But I can't let you stop me.

Supergirl

J'onn. J'onn. J'onn. Listen to me. I lost everything - everyone. It makes a hole in your heart. But you can't fall into it. You have to fill it. You have to fight. Do not throw away who you are. If you do that thing wins. The last son of Mars dies even if you're still standing.