Overview: Jon Bentley compares three budget-friendly coffee machines against a model worth over £15,000, while Craig Charles arms his house with a techy smart lock. Ortis Deley gains behind-the-scenes access to a company that makes drones for the British military. After taking a couple of the devices for a spin, he finds out how this top-secret tech could soon be in drones available to the public. Meanwhile, Georgie Barrat and the G Team advise a tennis coach who wants to see if gadgets can give her players the edge.