The Machine is a device that is meant to amplify Roger's ability to stop time and bring all of the Tomorrow People to the Refuge, a place where the Tomorrow people would no longer fear humans. Other than Roger the only other person able to properly use the machine was his son, Stephen. When the machine is activated, any human within the range of the machine's blast radius would have their time stopped and could be killed by a tomorrow person because a person whose time is stopped isn't technically alive. Once the machine builds up enough power, even without a host inside the machine, it will continue to grow in power until it hits critical mass and stops the time for all humans in the range of the blast. When Stephen destroyed the machine, the power that were stored in the machine ripped apart time-space and created a vortex that sucked the Founder into it.