When Oliver and Chloe check out Pemberton's car, they find the journal. Oliver turns past the pages with his photo, and looks at the pages with Black Canary and Aquaman. However, in the next shot he hands it back to Chloe and the book has instantly flipped back to Oliver's pages.
Trivia: The items in the JSA brownstone are: boxing gloves (Wildcat, Ted Grant), Green Lantern power battery, ring, and mask (Green Lantern, Alan Scott), Winged Helmet (The Flash, Jay Garrick), Fair Play weight belt (Mr. Terrific, Terry Sloane), Hourglass (Hourman, Rex Tyler), and throwing knives (Hawkgirl, Shiera Hall)
When Green Arrow saved Stargirl from Icicle's attack, the angle the arrow came in at was impossible considering where he was standing. He was almost directly behind Stargirl so it couldn't have come in from the side of the screen like it did, and he was too close to have ricocheted it off anything.
Trivia: The 15 heroes in the portrait, left to right, are: Star-Spangled Kid, Wildcat, the Atom, Sandman, the Spectre, the Flash, Hawkman, Hawkgirl, Dr. Fate, Green Lantern, Hourman, Dr. Mid-Nite (with Hootie the owl), the original Black Canary, and Mr. Terrific.
Pemberton: You're the one they call Watchtower.
Pemberton: Technology today makes hiding a whole lot harder, Miss Sullivan. When someone like you reaches out and plugs into so many outlets, someone else is bound to pull out one of those cords and follow it back to the source.
Oliver: Is that my e-mail? Chloe, I'll have you know that those messages between me and Canary are purely platonic.
Kent: Red, white, and blue. Two betrayed. Stars and Stripesy, stars and stripe. Sandman doesn't dream anymore. Is Mister Terrific still terrific? I don't think so.
Clark: Who's that?
Kent: Who is that? Who is that? Kent Nelson. Dr. Kent Nelson. But the doctor is out. He's gone bowling.
Carter: My friend is very sick.
Kent: Ticktock. The Hourman's run out. The Atom is split. No, he doesn't. He doesn't, Nabu, so stop whispering.
Carter: Look at Kent Nelson, Courtney. He spends most of his days wandering the streets, searching for the secrets to the universe at the bottom of trash cans.
Courtney: So, Dr. Fate is incapacitated. The Sandman and the Star-Spangled Kid are both dead. You were their leader. What's your excuse? Please don't make me ask another team for help.
Carter: Oh, the kids out there playing hero are hardly a team. They don't know how to lace up their own boots.
Courtney: Well, maybe if you had laced up your boots when Sylvester had asked you to, he might still be alive.
Carter: Don't waste your breath. I have enough guilt to last 20 lifetimes.
Kent: Please, Nabu, don't whisper too loudly. Don't show me what could be or not be. Fate is a fickle thing.
Carter: It's been a long while since I've made someone bleed. Time to go hunting.
Green Arrow: Red, white, and blue. Loud and proud to be an American. Nice.
Stargirl: Well, at least I'm proud of something other than myself.
Green Arrow: What's that supposed to mean?
Stargirl: I know what kind of hero you are, Green Arrow.
Green Arrow: Is the masked cheerleader really talking down to me?
Clark: But none of us here are the bad guys.
Green Arrow: You sure about that, Clark? The winged warrior here threw me through a window.
Hawkman: I hope I didn't make you cry.
Green Arrow: Drop the mace, Conan.
Hawkman: I will... on your head.
Green Arrow: Bring it, big bird. Just for the record, you started it.
Hawkman: I'll finish it.
John Jones: I hope it's not too late to say, "We come in peace."
John Jones: Even when I had the power to leave Earth, I chose not to, for one reason--hope. Hope for the future. Humanity's capacity for violence is great, but their capacity for hope is greater than any I've ever encountered.
Carter: I wasn't the leader they thought I was. I made too many mistakes.
Clark: I've made mistakes, but I haven't quit.
Carter: Haven't quit? You haven't started. Not as a team, anyway.
Clark: You're making this too personal.
Carter: That is our strength, not our weakness.
Green Arrow: I hate waiting.
Hawkman: But you love talking. Shut up.
Oliver: What are you--my chaperone?
Hawkman: Think of me as your parole officer but with a mace.
Oliver: Well, I don't know what that means, but this whole thing is bad news. You want to know why? 'Cause no one's been able to answer "why"?
Hawkman: Why what, green punching bag?
Dr. Fate: But when I see the future of someone such as yourself, I believe in tomorrow again.
Clark: When you saw my fate, what did you see?
Dr. Fate: You will lead this generation as Hawkman once lead ours.
Clark: You sound like a group I met from the future. They hinted at my destiny, but they were as vague as you are.
Dr. Fate: Then let me be specific. Although Lex Luthor is your ultimate opponent, you will triumph over him.
Clark: Lex? Lex is dead.
Dr. Fate: And when you show yourself to the world, it will be a different age than ours, Clark--a Silver Age of heroism. That will start when they look up into the sky at you with hope for tomorrow. You will help everyone embrace it.
Clark: Lois? What's she doing here? She shouldn't be in the middle of this.
Dr. Fate: She is the key.
Dr. Fate: Greetings.
Lois: What the...? What is this, reverse Halloween? Nice helmet.
Dr. Fate: Thank you.
Dr. Fate: I see your fate, Lois Lane. You are the one he will need. He is the one you will need.
Dr. Fate: The savior... the one who will lead us all... the sentient power.
Green Arrow: I'm thinking we should regroup with the others before we go after Icicle Junior.
Hawkman: You go back to Sherwood, Robin Hood. I'll turn the Icicle into slush myself.
Green Arrow: You know, you really got to work on your landings.
Hawkman: It would have been a lot smoother if you hadn't thrown up.
Green Arrow: Send me your dry-cleaning bill.
Hawkman: Send me your dinner bill.
Icicle: I killed you.
John Jones: I'm Mars' sole survivor. There's a reason for that.
Clark: They're the best friends that I have, Carter, but I don't know if we'll ever be what the JSA was.
Carter: You have to trust them.
Clark: I do.
Carter: You have to remember they're people, too. They'll make mistakes. We all do. We all have to keep trying. Isn't that what you said?
Carter: You know, I only learned to fly after my kingdom was attacked and taken from me. It was only then I realized it wasn't the throne that was important. It was my people... my wife.
Clark: What about you? You going to keep your wings locked up?
Carter: No. No. No, I am putting people under them. Chloe helped Courtney and I locate the remaining members of the JSA, their children, and their proteges. I think the coming generation could stand to learn a thing or two from those of us that have done it before.
Carter: You're not like the others, are you, Clark? Kids that are in it for the thrills, or because they have a chip on their shoulder. You don't do this for glory or vengeance.
Clark: I guess not.
Carter: Your team is better than I thought, too. Even I have to admit, Green Arrow has pretty good aim.
Courtney: So what do you call your team anyway?
Clark: A work in progress.
Oliver: Anyone home?
Chloe: What's up?
Oliver: Nothing, actually. I, uh, I thought I'd stop by and see if anyone's hungry.
John Jones: I could use some dinner. Chloe?
Chloe: Uh, sure. You're buying, Mr. Queen.
John Jones: Don't look at me, I'm living off a policeman's salary.
Oliver: Ah, fine. Dessert's on you.
John Jones: On Mars, we never had dessert, but I have grown especially fond of cookies.
Clark: Do you believe in fate, Lois?
Lois: Only the kind you make happen.
Waller: There's an army of heroes growing. This generation and the last are coming together. And I'm going to need everyone if we're going to survive the apocalypse that is coming this way.
Icicle: Apocalypse? This is not what I signed up for.
Waller: Welcome to the Suicide Squad. (shoots him dead)
Callum Blue is credited but doesn't appear.
Paul Kupperburg and Steve Erwin are credited as creators of Checkmate.
UK: August 3/10, 2010 on E4/E4 HD (Part 1/2)
Sweden: August 13, 2010 on TV6
Turkey: April 3, 2011 on CNBC-e
Norway: April 17/24, 2011 on Max (Part 1/2)
Czech Republic: October 10/11, 2011 on TV Nova
Injoke: Oliver asks where the other SuperFriends are, and Chloe wishes the group could come up with a standardized Trouble Alert. The Trouble Alert was what was used at the Hall of Justice in the various SuperFriends series.
Injoke: Chloe's reference to a "secret society of retired supervillains" is an injoke to the Secret Society of Supervillains, the name of various groups of supervillains who have banned together under the common name. They had their own comic book briefly in the 1970s, and have appeared sporadically ever since.
When Dr. Fate sees Clark's future, stock footage from the season 3 episode "Hereafter" is used, shown in reverse.
Injoke: The coffee cafe that Chloe exits at the beginning, Radu's, is the hangout of Green Lantern Kyle Rayner in the comic books.
Injoke: Lois mentions interviewing Michael Holt. In the comics, Michael Holt is the modern-day Mr. Terrific. His Golden Age predecessor is one of the JSA heroes seen in the portrait, and mentioned by Nelson.
This episode was originally planned as two separate episodes, "Society" and "Legends," but The CW authorized its airing as a two-hour two-word feature event: the first one since the series premiered.
Green Arrow: Bring it, Big Bird!
Big Bird refers to the giant 8 foot 2 inch yellow bird character from the children's learning television series Sesame Street. Big Bird was the first Muppet (Jim Henson puppet) to appear on the show created in 1969. On the show, different animal puppets, human characters, and celebrities interacted with each other, children, and the audience teaching numbers, letters, and lessons.
Oliver: Did you put the call into the Snow Miser?
Referencing one of the main characters in the TV Christmas special The Year Without a Santa Claus, based on the 1956 book by Phyllis McGinley. Snow Miser wars against his brother, Heat Miser, and they both refuse to help Santa Claus when he needs to prove to Southtown that he exists.
Oliver: Where are the other superfriends?
Referencing the various incarnations of the TV series, including Challenge of the Superfriends. The animated series was the closest thing to a Justice League TV series for many years. The core group featured Superman, Batman, Robin, Wonder Woman, and Aquaman, although various heroes and teenage sidekicks (including Zan and Jayna, from "Idol") were members throughout the years.
Green Arrow: Drop the mace, Conan.
Referencing Robert E. Howard's creation, Conan the Barbarian. Conan is a Cimmerian, a northern barbarian, in the Hyborian Age. A warrior, thief, and pirate by profession as his situation called for it, Conan eventually became the King of Aquilonia. He has been the subject of numerous comic books, movies, and TV shows. He is skilled with many weapons, although often uses a sword.
Chloe: If it isn't My Favorite Martian.
A reference to the 1963 sitcom My Favorite Martian, starring Ray Walston as a human-looking Martian stranded on Earth, who used his natural telepathic powers to comedic effect.