Seg-El gets a warning from a man who claims to be from the Future and now he has to save Krypton, but he may have to let Krypton face its fate. It's a prequel to Last Days of Krypton.

Ashley and Adam have been best friends and had many adventures since high school, so of course she is going to come with him to save Earth's greatest heroes. But things are rarely simple, and what starts as a simple mission turns far more complicated with politics and rebellion, and knowing Krypton's fate makes saving the timeline a whole lot harder, even with Seg-El's help.

Zod, Nyssa thought to herself, soon you will kneel before me for mercy.

The story of how Kryptonians became so powerful under a yellow sun and why they refused to leave their planet even when the end times were near.

With the fate of the universe on his shoulders, Adam is forced to make the hard call and do whatever it takes to ensure the timeline is safe. Even if that means working with the enemy. - Spoilers for episode s01e08 "Savage Night."

Kem, Seg and Adam dealing with the end of episode s01e08, "Savage Night". Massive spoilers, obviously!