Alone on the quarantined British mainland and trying to survive pursuit by the infected, young Spike (Alife Williams) threw in with a small pack of Satanists led by the charismatic if deranged Jimmy Crystal (Jack O'Connell). That poor choice would bring Spike back into the orbit of Dr. Ian Kelso (Ralph Fiennes), whom Crystal decided would be the means of keeping his eroding hold on his cultists. Fourth franchise entry from director Nia DaCosta and scripter Alex Garland co-stars Erin Kellyman, Chi Lewis-Parry. 109 min. Widescreen; Soundtrack: English.