: Bill intervenes to help Isla, the young alien held hostage by the military group, allowing her to escape and return to her people.
: Catherine focuses on computer algorithms left by Dylan, a survivor who was found dead. She makes a startling discovery regarding how the aliens traveled to Earth and begins to decipher the behavior of their robotic quadruped "dogs".
: Following the fallout, Sacha’s behavior becomes increasingly erratic and disturbing as he secretly follows the group to stay near Emily.
: Bill continues his research into a biological weapon, using Emily as a test subject. He makes a request that inadvertently puts Zoe in danger while trying to protect his findings.