In some places, the nearest safe operating room can be hours or even days away. We find out about a portable operating theatre called SurgiBox that fits in a backpack and inflates in minutes, creating a safe surgical environment for operations almost anywhere. We meet the co-founder of the start-up behind it and see it put to the test, and speak to a surgeon who has used it to save lives far from a hospital. We also hear from Field Ready, whose engineers in Syria are using 3D printing to bring broken hospital equipment back to life, and we hear about Sudan’s Emergency Response Rooms — grassroots command centres where volunteers coordinate life-saving help and vital information in the midst of war.