Justice League (Season 1, Ep 8): Injustice For All Part 1

Lex Luthor gets a terminal diagnosis. He responds to this news by putting together a team of villains.

Justice League (Season 1, Ep 7): The Enemy Below Part 2

The Justice League must work to undo a coup in Atlantis and stop the resulting attack on the surface that comes from it.

The Justice League makes contact with Atlantis after the Atlanteans sink a submarine.

The new team of superheroes must save Superman and Hawkgirl before the leader of the invaders – the Imperium – arrives.

A conspiracy unfolds that creates a threat to earth larger than what Superman or Batman can handle on their own.