The fifth episode focuses on data integrity and also on data integration in long cohort studies. It features Richard Hulek - a computer scientist with a background in environmental informatics, experienced in the integration of systems behind long cohort studies. Let's listen to his opinions on how computer scientists may contribute to the education of data analysts. Let's learn something new about DBT - a promising transformation data tool and let's not forget SQL - the basic language of data. Be inspired by the concept of exposomics - the systematic determination of links between environment and human health.