Crisis on Infinite Earths final logo "Things were looking a little grim, but part of me was, admittedly, a little excited for a "reunion" of old friends."

Cisco Ramon[src]

This episode is part of a larger crossover series, Crisis on Infinite Earths.

"Mon-El taught us everything we know. From Aristotle, Shakespeare, Bon Jovi..."
"But we have some gaps. And unfortunately, even if we know the end result, we don't necessarily know how it happens.

Imra Ardeen and Mon-El[src]

This article contains plot details about an upcoming episode.

"Crisis on Infinite Earth: Hour One"[4] is the upcoming ninth episode of the fifth season of Supergirl, and the ninety-sixth episode overall. It will air on December 8, 2019[1].

The episode is the first part of the five-part crossover, Crisis on Infinite Earths​.


Shooting for Crisis on Infinite Earths began on September 24, 2019.[5]


  1. "Arrowverse 'Crisis on Infinite Earths' Crossover Adds Black Lightning Stars, Bruce Wayne — Get Full Schedule" - TVLine
  2. Stephen Amell (@StephenAmell) - Twitter
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 - First Look at Crisis on Infinite Earths Part One as Supergirl Photos Are Released Online - Comic Book
  4. "Supergirl - Episode 5.08 - 5.09 - Titles Revealed" - SpoilerTV
  5. Marc Guggenheim (@mguggenheim) - Twitter
Community content is available under CC-BY-SA unless otherwise noted.