In California citizens can ask for their previous convictions for carrying marijuana expunged since it is now legal to use the substance. But, It is often a lengthy and expensive process which has resulted in affluent people managing to do it whilst people from impoverished backgrounds have to live with the record. Now an AI algorithm is hoping to correct this - Dave Lee investigates the software trying to help. Over in Japan, Spencer Kelly focusses on the country's latest Space Race efforts - and Lara Lewington tries out the wearables analysing gait to potentially spot disease. Plus a visual feast as we look beneath the surface of the latest visual effects behind the recent Dumbo movie.