Generator Rex Season 2 Episode 13 Night Falls Episode Title:Night Falls.Episode Description:Rex and Caesar travel to a village in Mexico to see their honorary grandmother, "Abuela," whom they used to visit frequently when Rex was young. Rex is reacquainted with his childhood friend Federico, and learns that the mayor of the town, Esteban, is trying to force Abuela to leave. Rex and Caesar then discover that Federico and various others in the village are EVOs who assume werewolf-like forms at night. After Federico nearly attacks the village, Esteban hires Hunter Cain to attack Abuela and the EVOs under her protection. Rex and Federico defeat Cain, and Caesar and Rex are able to give Federico and the others control over their transformations.