What's the best way to get involved in scientific research from home? Chris Smith and Dominic Ford investigate some of the best citizen science projects which are looking for your help. From categorising galaxies to hunting spiders and even digging in your backyard - how will you choose to get involved? Plus, could mapping your happiness improve your mood? In the news, how a blue whale's ear wax can tell us about ocean pollution, why Curiosity hasn't found any methane on Mars, why the Raspberry Pi Foundation have linked up with Google to develop kids programming skills and the parasite that stops mice being afraid of cats.