The Fourth Wave
- Episode aired May 21, 2021
Rachel continues researching the new SUN-9 virus while managing an alarming situation in Lily's life. Zach comes under scrutiny at the CDC.Rachel continues researching the new SUN-9 virus while managing an alarming situation in Lily's life. Zach comes under scrutiny at the CDC.Rachel continues researching the new SUN-9 virus while managing an alarming situation in Lily's life. Zach comes under scrutiny at the CDC.