KARA: But I can't help thinking that...
...if I had done things differently,
maybe things would have turned out differently.
You shouldn't have to be so cynical.
You're good and righteous and the tragedy is...
...the world has made you cynical.
Because you've been betrayed so many times...
...by your mother,
by your brother...
...and now, by me.
LENA: What are you talking about?
ALEX: Hey, we have to stop her Kara,
the safety of the world depends on that.
KARA: She is not Lex! I will not treat her like a villain.
You once told me Kara Danvers was your hero.
Now you have someone who will stand up for you, always.
It's me, Lena.
I've always been Kara.
LENA: Kara, how could you?
You expect me to be your partner after this?
When all you've done is prove to me you can't be trusted at all!
Imagine what we could do together, a Luthor and a Super working together as a team!
LENA: And if we were partners we could change the world.
KARA: Lena...
...there's something I have to tell you.
LENA: What Lex did...
...what you did,
what did you think would happen when you came here?
That you'd tell me everything in a fit of selflessness even if it meant that I knew how you betrayed me?
And then I'd just keel over and forgive you?
KARA: Lena, I hurt you I-
...I know I hurt you and I'm never ever going to do it again.
I know how much good you want to do in the world.
Think of what we could do together to help people.
LENA: Kara!
Funny...
...Lex gave me the same pitch.
KARA: You're not seriously considering are you?
LENA: When you were Reign, and I made kryptonite to stop you...
KARA: Is that kryptonite?
LENA: In response, Supergirl was so horrible.
KARA: You have gall lying to my face.
LENA: Kara was the same, she was so kind and supportive.
It made me think which was the real Kara?
and if the real Kara thought I was a villain...
...then maybe that's all I really am.
KARA: And I don't blame her. I mean I'm supposed to be her best friend and I lied...
...and betrayed her just like everyone else in her life has.
Don't let my mistakes turn you into something you're not.
I never meant to deceive you.
I just didn't know how to tell you.
No, even if I did trust you. Even if we were on the same side...
...you are never going to my kryptonite ever again!
No matter what, we are always on the same side.
LENA: You did me a favor, Kara.
KARA: Lena...
...don't do this.
LENA: And I learned what kind of deceitful person you really are, and that's what inspired me to do this.
KARA: He wanted my mistakes to change you.
He wanted you to become him,
but you are nothing like him.
Nothing.
I will always be your friend...
...and I will always protect you.
I promise.
LENA: All the while there wasn't a single honest moment in our friendship.
KARA: No, no that is not true-
LENA: NO, I KILLED MY BROTHER FOR YOU, FOR OUR FRIENDS! DON'T YOU UNDERSTAND WHAT YOU'VE DONE?!
Let me guess...
...you're here to tell me once again that I should forgive you?
KARA: Not this time.
I'm done blaming myself for your bad decisions.
I will do everything in my power to stop you...
...just like I would any other villain.