Cracking the Code Extant : Season 2 Episode 4
TV-14 CBS 42m
Aired: July 22nd, 2015 @ 9:00 PM EST on CBS
As Molly works to create a virus that will eradicate alien hybrids, she discovers that aliens are trying to communicate with humans through a hidden message in their DNA. Also, Lucy helps Ethan run away from Charlie in order to help him recover memories of his mother, Molly.
