Following the Fukushima radiation scare, the team turns its attention to nuclear power.
Dallas investigates a potential helium shortage, and Dr Yan tests radiation knowledge.
Dallas downs his toothbrush to discover what causes tooth decay and gum disease.
Liz investigates bedbugs, and Yan explains why statistics are not to be trusted.
Topics include new stem-cell research and the Nocebo effect (placebo's evil twin).
Jem witnesses the awesome power of rockets with the Bloodhound land speed record project.
Liz hits the beach with the RNLI to experience the power of rip currents.