Extant Season 2, Episode 4 :

About Extant Season 2, Episode 4 :

Molly attempts to make a virus to destroy alien hybrids and she finds out that aliens are attempting to communicate with humans through a hidden message in their DNA. Guest Stars: Adam Zastrow, Joey Abril, Mary Gallagher, Billy 'Sly' Williams, Jennifer Say Gan, Joe Sabatino, Chris Johnen, Michael Spellman, Necar Zadegan, David Morrissey, Michael Gladis, Lyndon Smith, Kiersey Clemons,