Dr Chris swallows a supercool camera pill to follow the journey that food makes through his body. Dr Xand explains how strong our bones are and meets someone who has developed the technology to grow bones in a laboratory. Also, Dr Chris is put to the test as he takes part in a realistic mock surgery scenario. Meanwhile, over in accident and emergency, one patient's race to the finishing line means a trip to surgery to fix a broken elbow, and another is admitted with a sore eye and blurred vision.
