With the CW's Arrowverse's three-night "Elseworlds" crossover only a week away (The Flash "Elseworlds, Part 1" airs Sunday, December 9; Arrow "Elseworlds, Part 2," airs Monday, December 10; and Supergirl "Elseworlds, Part 3," airs Tuesday, December 11), the network gave Supergirl viewers a post-credit tease that showed the "infinite" gravity of this "crisis" (and will be aired during the credits of Arrow and The Flash)
Set on Earth-90 (see where this is going?), the planet appears to be at its end days – with the bodies of heroes like Green Arrow, Stargirl, Vibe, and tragically more. The only apparent survivor? John Wesley Shipp's The Flash (get it now?), who's seen crawling towards an ancient and mysterious book owned by none other than LaMonica Garrett's Mar-Novu/The Monitor.
The Monitor: "You failed."
The Flash: "Why are you doing this?"
The Monitor: "You did this to yourself, and now all of you will perish."
The Monitor opens the book once again as The Flash speeds away and…viewers wait until next Sunday to find out!
If you're reading this then you probably don't need the reminder – but just in case, this year's event also brings us Ruby Rose as Kaye Kane/Batwoman, John Wesley Shipp as The Flash (???); Tyler Hoechlin as Superman- Clark Kent and Elizabeth Tulloch as Lois Lane – and possibly some cool surprises.
"Elseworlds, Part 1" — (8:00-9:00 p.m. ET)
EPIC ELSEWORLDS CROSSOVER KICKS OFF TONIGHT — When Barry Allen (Grant Gustin) and Oliver Queen (guest star Stephen Amell) wake up one morning and realize they have swapped bodies with each other, the two set off to find out what disturbed the timeline to cause such a shift. However, things quickly go from bad to worse when they present their case to Team Flash and the gang doesn't believe them. Barry and Oliver realize they need Supergirl's (guest star Melissa Benoist) help and travel to Smallville on Earth-38 where they end up meeting Kara's cousin, Clark Kent (guest star Tyler Hoechlin), and intrepid reporter, Lois Lane (guest star Elizabeth Tulloch). LaMonica Garrett guest stars as The Monitor. Kevin Tancharoen directed the episode written by Eric Wallace & Sam Chalsen.
"Elseworlds, Part 2" — (8:00-9:00 p.m. ET)
THE ELSEWORLDS CROSSOVER CONTINUES IN GOTHAM CITY WITH BATWOMAN (RUBY ROSE) — With Oliver (Stephen Amell) and Barry (guest star Grant Gustin) still stuck in the other's bodies, the two get a lead on John Deegan (guest star Jeremy Davies) and head to Gotham City with Supergirl (guest star Melissa Benoist) to figure out why their reality has changed. While there, they meet the mysterious Kate Kane (guest star Ruby Rose) who provides them with information that leads the group to Arkham Asylum. James Bamford directed the episode with teleplay by Marc Guggenheim and story by Caroline Dries.
"Elseworlds, Part 3" — (8:00-9:00 p.m. ET)
THE BATTLE CONCLUDES — Supergirl (Melissa Benoist), The Flash (guest star Grant Gustin), Green Arrow (guest star Stephen Amell) and Superman (guest star Tyler Hoechlin) engage in the battle of their lives. Jesse Warn directed the episode with story by Marc Guggenheim and teleplay by Derek Simon & Robert Rovner.