We look at how the problem of online hate in football has been studied and analysed so far. Professor Theo Lynn of Dublin City University talks us through the challenges and opportunities involved in the cutting edge data analysis of a decade and a half of football-related online hate on Twitter. Than Dr Gary Sinclair, also of DCU, discusses what's been learned so far in the existing academic research into the problem, and what needs to be researched in the future. This first episode provides a grounding on what we know about online hate in football, before tackling who it targets and what issues it intersects with in later episodes.