Oh, my. We’ve still at least a week to go before the likes of Supergirl, Flash, Arrow and Legends of Tomorrow get together for a milestone four-way crossover (not to mention Arrow’s milestone 100th episode), so why stop at clips and trailers? The full photo sets from all four episodes have arrived, and we’ve assembled them all in one handy locale. OF JUSTICE.

First and foremost, November 28 will kick off the four-part event with otherwise-unrelated Supergirl installment “Medusa,” as Helen Slater returns to town as Alex and Kara’s mother, while Mon-El seems to be in a bad way. At the very least, we do see Barry and Cisco dropping by to get things rolling, while the full synopsis reads:

A NIGHT OF CONFESSIONS; THE EPIC SUPERHERO CROSSOVER KICKS OFF TONIGHT — Eliza (guest star Helen Slater) comes to town to celebrate Thanksgiving with her daughters. Alex (Chyler Leigh) decides it’s time to come out to her mother; Kara (Melisa Benoist) is shocked when Eliza suggests Mon-El (Chris Wood) has feelings for her, and Winn (Jeremy Jordan) and James (Mehcad Brooks) consider telling Kara the truth about the Guardian. Meanwhile, CADMUS unleashes a virus that instantly kills any alien in the vicinity so Kara enlists an unexpected ally – Lena Luthor (Katie McGrath). The epic superhero crossover kicks off tonight when Barry Allen (guest star Grant Gustin) and Cisco Ramon (guest star Carlos Valdes) seek Kara’s help with an alien invasion on their Earth.

From there, The Flash will backtrack a bit to showcase the alien “Invasion!” itself, before Barry assembles the collective might of Green Arrow and the Legends, and ultimately, Supergirl. As you can see throughout, Oliver remains his usual grumpy self:

IT’S HEROES VS. ALIENS IN THIS EPIC CROSSOVER EVENT — When aliens called the Dominators attack Central City, Barry (Grant Gustin) speeds over to Star City to ask the Green Arrow (guest star Stephen Amell) for help in stopping them. Realizing the battle against the Dominators is bigger than they thought, they track down the Legends of Tomorrow, and Barry and Cisco (Carlos Valdes) create a breach to bring back a secret weapon – Supergirl (guest star Melissa Benoist). Once all of the super friends are assembled, they come up with a plan to attack but a shocking secret related to Flashpoint is revealed and suddenly no one is sure who they can trust. Meanwhile, Wally (Keiynan Lonsdale) wants to join the battle against the aliens but Iris (Candice Patton) tells him he’s not ready.

Wednesday will then see a short interlude in the four-way crossover, as Arrow celebrates 100 episodes with a wonderful life for Oliver Queen, and his very-living parents and fiancée, Laurel Lance! We’re going to go ahead and assume aliens did it.

ARROW CELEBRATES 100 EPISODES; THE EPIC SUPERHERO CROSSOVER CONTINUES — Oliver (Stephen Amell) wakes up to a life where he never got on The Queen’s Gambit. Robert (guest star Jamey Sheridan) and Moira Queen (guest star Susanna Thompson) are alive and well. Laurel (guest star Katie Cassidy) is his loving fiancée and their wedding is imminent. Everything seems perfect, but Oliver starts to notice small imperfections that make him question this new reality. Meanwhile, Felicity (Emily Bett Rickards) and the recruits take on a new threat with help from The Flash (guest star Grant Gustin) and Supergirl (guest star Melissa Benoist).

Assuming you’re not sick of superheroes by Thursday, Legends of Tomorrow will return us to the real world for one final showdown with the Dominators, and sadly, the return of Kara to her own Earth. So concludes “Invasion!”

ALL FOR ONE AND ONE FOR ALL IN THIS CROSSOVER OF SUPERHEROS — After learning the Dominators’ plan for the world, the Legends must work together with The Flash (guest star Grant Gustin), Supergirl (guest star Melissa Benoist) and Green Arrow (guest star Stephen Amell) to kill them once and for all. Meanwhile, Stein (Victor Garber) figures out, with the help of others, how the team can terminate the Dominators, but is distracted by the aberration he realizes he created in 1987.

We’ve still got one more Supergirl and Flash to get through next week, but check out the trailer again below, and prepare for the big “Invasion!”

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