The Martian waterfall is named after Eris, the Greek goddess of strife, discord, and rivalry. An appropriate name and location for this episode in which a group of exo-scouts who don't quite get along are settled nearby. One should also note, Mars is associated with the Greek god of war, Aries, and Eris is also his friend and sister.
Raptor: Serve you and Phaeton.
Tyhponus: It talks.
Raptor: I am second brood, more smart.
Typhonus: Good for you.
Torres: Look, I can take all of you to my squad, they'll get you to safety but you've got to do exactly what I tell you to do.
Rabbit: Who do you think you are, our mother?
Torres: That's Sergeant Mother to you kid!
We see the inside of the mysterious alien underground complex found in the Marsian desert for the first time.