28 Weeks Later (2007)

Six months after the original outbreak turned most of Britain into rage-infected zombies, the military steps in to declare London safe for resettlement. Survivors and refugees are brought back in small numbers to a heavily guarded zone, hoping to rebuild a sense of normal life. At first, things seem controlled, but fear and tension are everywhere. Two siblings sneak out of the secure area, desperate to find out what happened to their family. In the process, they accidentally trigger a new wave of the infection-one that spreads much faster than anyone's ready for. The military's grip starts to slip as chaos explodes inside the safe zone, and everyone inside faces a frantic race to escape as the infection tears through soldiers and civilians alike. The story follows a handful of survivors-each with their own priorities and secrets-as they try to make it out of the city before it's completely overrun. The film doesn't slow down, keeping the focus on panic, split-second decisions, and the growing sense that safety is just an illusion. No one is truly in control, and the threat never really goes away.