Clark Kent/Kal-El of Krypton
Alexander ('Lex') Joseph Luthor
At the beginning of the episode, we are told that the airplane pilot saw Kara shoot into the sky in a red-blue blur, but when she escaped from Clark, she was a silver blue.
When Clark sees Kara in danger, he risks the kryptonite radiation to save her. However, he doesn't use his heat vision at a distance rather than get closer to the kryptonite.
Agent Walker is seen in Washington D.C. throughout most of the episode. However, despite the fact that Kara is clearly operating in Washington D.C., when she breaks into his lab, Walker flies to Smallville. There's no indication that he would believe Kara went back to Smallville, and it would take several hours to fly there and back. Yet somehow he is there exactly when she breaks into Luthor Manor.
The photo of Lara is hidden behind a picture of Martha. However, the entire Kent house was destroyed by a meteor strike at the end of Season 4 in "Commencement."
When Kara and Lara are in the Kents' living room in 1986 you can see a TV which is not from that time frame but from the 1990s.
Kara: Tell your boss. I only want what's mine.
Agent Carter: My boss is the United States of America.
Lionel: Can't I take an interest on my son's well-being?
Lex: Oh, which son is that? You spend as much time protecting Clark as you do pushing me away. Exactly whose father are you?
Lionel: I wish I could say yours and be proud. Your treatment of Lana...
Lex: C'mon, Dad. I learned from watching you with Mom. I was just... being a Luthor.
Chloe: Clark, you're not the one who played chicken with an airplane. Besides, she's not your responsibility. You're her cousin, not her father.
Clark: But I pushed her away, Chloe. I didn't trust her. And now she's alone and angry. I have to find her and bring her back before she hurts someone.
Chloe: Or uncorks the Kent family secret. I mean, clearly, Kara does not fly below the radar.
Kara: That crystal is the only thing I have left of home. But you could care less.
Clark: That's not true.
Kara: It's always about what you want. You act such like a hero. But really, all you think about is yourself.
Clark: I'm not the one who took off and didn't tell anybody where I went.
Kara: Was I supposed to give you an itinerary? We may be cousins, but I don't have to like you. Stay out of my life.
Kara: Why are you doing this? You're hurting me.
Agent Carter: Well, if I wasn't hurting you, you'd be hurting me. We humans--we call it "survival of the fittest."
Kara: I am human.
Agent Carter: I want to know about your home planet.
Kara: You're on it. It's called Earth.
Clark: (opens Martha's portrait and find Lara's picture inside) I don't believe it. After all this time.
Kara: That means that I really was here, and everything that I saw was true.
Clark: When I saw my mother in your memory, she was so beautiful... just as beautiful as she is in this picture. You really loved her, didn't you?
Kara: I did. Just like I love my father. Until now, I thought he was such a God--a real Kryptonian hero. But you're right. He was nothing like that.
Clark: Your father did some terrible things. But in his own misguided way, I'm sure he loved you.
Lex: However, the term "classified" has never prevented me from getting what I want.
Lionel: Striving for complete isolation? Dangerous choice. No man is an island entire of itself.
Lex: Glad to know your son still ranks a spot on your busy itinerary.
Zor-El: Remember, Kara, a true Kryptonian embraces their destiny no matter what.
Clark: Lionel... welcome back.
Lionel: Clark. Oh.
Clark: I'm glad you're okay.
Lionel: Yes, well... in the darkest hour, the soul is replenished and given strength to continue and endure. Luthors are survivors, Clark.
Chloe: Look, I know how this is gonna sound, coming from me, but you and Kara are from different worlds. Just be careful, okay?
Jimmy: Chloe, Kara is from Minnesota. It's not like she's from another planet.
Erica Durance is credited but doesn't appear.
Helen Slater has been involved with Superman before, having played Kara (Supergirl) herself in the 1984 movie Supergirl.
Music: "Super Sexy Free" by Bosshouse, "Lucid" by Eek
When Kara hacks the government files, the names listed include show crew Winica Dewangga (Office Production Assistant), Ling Yang (Storyboard Artist), Kristina Lyne (Graphic Designer), and Lorna Jacobson (Accounting Clerk).
Latin America: Tuesday, December 11, 2007 on Warner Channel
Norway: Monday, February 11, 2008 10.50 pm on TVNorge
Denmark: Monday, May 5, 2008 on TV3
Australia: Thursday, May 8, 2008 on Ten HD
United Kingdom: Tuesday, June 24, 2008 10.00 pm on E4
Sweden: Friday, July 4, 2008 9.00 pm on TV6
Czech Republic: February 22, 2010 on TV Nova
Slovakia: August 10, 2010 on Markiza
Kara: You know, UFOs, aliens... galaxies far, far away?
This is a reference to the Star Wars media franchise, in which the movies, games, etc., usually begin with the line "A long time ago, in a galaxy far, far away..."
Lionel: No man is an island entire of itself.
Lionel is quoting from a sermon of John Donne (1572-1631), a poet and preacher. The line would later be the inspiration for writer Thomas Merton's No Man Is An Island (1955).
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