WARNING: The following contains major spoilers for “Crisis on Infinite Earths," the latest Arrowverse crossover which premiered Tuesday on The CW.
Even though the third chapter of "Crisis on Infinite Earths" ended with the destruction of the entire DC Multiverse, the ultimate DC crossover still found plenty of room for cameos and depp-cut Easter eggs in its final two parts.
Now, we're breaking down all of superhero cameos and Earths that appeared in the final two chapters of the Arrowverse's biggest crossover ever.
The Planet Maltus
Before the Monitor was the Monitor, he was simply a scientist named Mar Novu on the alien world Maltus. While it's not clear which universe "Crisis" depicts, this part of the crossover begins with Mar and his wife Xneen, traveling back to the dawn of time and accidentally releasing the Anti-Monitor at the dawn of time and causing the Crisis.
The Speed Force Ghosts
After Oliver Queen unlocks his full potential and becomes the Spectre, Barry Allen carries the Paragons into the Speed Force, where we see characters interacting with a series of memories from the Arrowverse's past.
Kate Kane walks into a confrontation between Oliver and Ray Palmer after Ray learns that Oliver is Green Arrow, Sara Lance is trapped in her dead body as Laurel and Diggle look over her, J’onn J’onzz sees Oliver and Kara arguing with each other during the Invasion! crossover, and Barry finds himself at the end of the Elseworlds crossover, speaking with Oliver, Superman and Lois Lane.
The DCEU Flash
In what's arguably the biggest cameo in the entire crossover, the Arrowverse's Flash encounters Ezra Miller's DCEU Flash as he's running through the Speed Force. They’re both a little confused by this, but the Arrowverse Barry Allen understands that he's somehow speaking with his alternate counterpart.
While the DCEU Barry Allen seems completely thrown off by the situation, he mentions he told Victor (Victor Stone, his teammate Cyborg) that the multiverse should be possible.
The Dawn of Time
While it doesn't take place on any one Earth, Oliver Queen/the Spectre's final climactic battle with the Anti-Monitor takes place at the Dawn of Time. Seemingly existing outside of time and space, this also marks the last time all of the Paragons fight together, holding off Shadow Demons while Oliver fights the Monitor.
While this marks the place with Oliver died, it's also where the Paragons used the Book of Destiny to will the new universe into existence.
Earth-Prime
Although the main world of the Arrowverse has been called Earth-1 up to this point, "Crisis" follows in the example of the comic book crossover its named for and unites the heroes of several previous alternate worlds on the newly formed and newly named Earth-Prime.
Though we don’t get the name of it right away, we start Part 5 on Earth-Prime. This provides a slew of its own character cameos, as well as the setting for most of the DC shows going forward.
Marv Wolfman
Marv Wolfman, the writer of the original Crisis on Infinite Earths comic series (and co-writer of Part 4 of this crossover), appears on Earth-Prime as a fan of Barry and Kara’s after they defeat Weather Witch, a villain from Season 5 of The Flash.
Wolfman asks the pair their autographs while telling them that they’ve always teamed up together, which is the heroes' first explicit clue as to the merged nature of their new home on Earth-Prime, as if Lex Luthor winning the Nobel Peace Prize already wasn’t enough.
Sargon the Sorceror
Like any episode of Legends of Tomorrow, the final part of "Crisis" has its fair share of ridiculousness. In it, a giant Beebo rampages through Star City. After the heroes try in vain to take him down, they discover he’s a distraction and that the real threat is Sargon the Sorceror.
Although Sargon was originally a mystical hero in the 1940s, he appears to be somewhat more based on the post-Flashpoint version, who is more of a villain than a hero. This particular version seems to be a fairly ineffectual petty criminal with a flair for the theatrical.
Black Lightning
While Black Lightning already appeared in Part 3 of the crossover, his reappearance in this episode was a bit of a surprise. After saving Frost and Heatwave from one of the Shadow Demons, he stuck around with the heroes for the duration on the finale.
This firmly cements Black Lightning as taking place on Earth-Prime, which is a dramatic shift for a hero who was once isolated from the other heroes of the Arrowverse on his own world.
Sara Diggle
After being unceremoniously swapped out for John Diggle, Jr. in the wake of the Arrowverse's "Flashpoint," Diggle and Lyla's daughter, Sara, returns. As the Diggle family sits down to watch a presidential address about the Anti-Monitor threat, we see her come up to her parents, who tell her to go play with her brother.
While the Diggle family has some semblance of normalcy, it's not clear if this will affect the future of Diggle's adoptive son Connor, which could have a ripple effect in the Green Arrow and the Canaries spin-off.
Earth 2 - Stargirl and the Justice Society
In a flurry of Earth cameos that mirror the start of the crossover, the finale shows moments from several other alternate worlds. The first we see is the Earth for the upcoming DC Universe show Stargirl. The designation of Earth-2 matches the DC comics designation for the Earth that contains the Justice Society of America, and we get a glimpse of that show’s version of the Justice Society, including Stargirl, Wildcat, Hourman, Doctor Mid-Nite, and S.T.R.I.P.E., the 15-foot-tall mecha.
Earth 12 - Green Lantern
On Earth-12, we see a green streak shooting away from Earth, followed by shots of Oa showing the seats of the Guardians of the Universe and a wide shot of the Green Lantern Corps. While these scenes seem to be taken from the 2011 Green Lantern movie, it could also hint at the world of the upcoming HBO Max Green Lantern series.
Earth-19 - Swamp Thing
We get a short shot of Swamp Thing, showing that he lives on, even if his show was canceled before the first season even finished airing. Its designation, Earth-19, is a likely reference to 2019, the only year the show aired on DC Universe.
Earth-9 - Titans
While the world of DC Universe's Titans blinked out of existence in Part 1 of Crisis, it has new life here. In scenes from the show--which is set to return for a third season--Raven, Jason Todd, Hawk, Dove and Starfire can all be seen.
Earth-21 - Doom Patrol
On Earth-21, the heroes of DC Universe's Doom Patrol can be seen dancing with abandon. With the exception of the Chief, every other member of the team--Crazy Jane, Robot Man, Elastigirl, Negative Man and Cyborg-- can be seen dancing outside of the Chief’s house.
Earth-96 Superman
After Lex Luthor replaced Brandon Routh's Superman in the Vanishing Point, the final fate of the Man of Steel from Superman: The Movie was left up in the air. However, the finale reveals that the dark, Kingdom Come-inspired world of this hero has seemingly been replaced by something brighter. In a homage to a classic Christopher Reeve Superman scene, this Superman flies out of Earth’s atmosphere and winks to the audience in an updated version of his classic costume.
The Hall of Justice and the Justice League's Table
As Earth-Prime's newly expanded roster of heroes gathers to meet and pay tribute to Green Arrow, the Flash presents them with two classic pieces of Justice League lore. After Supergirl lights an eternal flame in memory of Oliver Queen, the Flash unveils the Arrowverse version of the Justice League's Round Table, with each seat around the table bearing the logo of one of the heroes present. The abandoned S.T.A.R. Labs facility that the heroes assemble in also bears a striking resemblance to the Hall of Justice. the Justice League headquarters that was made famous by Superfriends.
Gleek
Back on Earth-Prime, the Arrowverse's remaining heroes hear a monkey. While we never see him, there’s a shot of an open cage, with “Gleek” printed on the side. As music from Super Friends plays, the reference to the Wonder Twins’s pet alien monkey, Gleek, becomes apparent. Since he's apparently loose in the Hall of Justice, there's no telling where he might pop up again.
As befitting a crossover of its magnitude, Crisis on Infinite Earths featured a ton of cameos from just about every DC property we expected them to come from - and a few that we didn’t. With many of the shows featuring the characters depicted here renewed for more seasons, there's no telling who could show up in the Arrowverse's next crossover.