Robots are under examination this week. Engineer Blaise Thomson, from Vocal IQ, designs speech systems for smartphones, Neil Bargh builds robots for science labs, and Airbus systems engineer Paul Meacham, who is building the next rover that will explore Mars, join Chris Smith, Dave Ansell and Ginny Smith to pit their wits against the assembled Cambridge public, answering questions like how would the Mars rover fare in Robot Wars? Plus, we make a motor from scratch and find out what happens when we dunk electronic devices in liquid nitrogen...