In this episode, we speak with Liam Kilmartin, a lecturer (since 1994) in electrical and electronic engineering at the National University of Ireland with particular interest in signal processing. In the 90′s, he was the principle investigator in a project developing a prototype system for automated goal detection with support from the Gaelic Athletic Association. His personal and academic interests have kept him involved with technology implementation in sport, especially football (soccer) and Gaelic Games. We talk with Liam about goal line technologies – the actual technologies, as well as the implications of their implementation. Here is an article about Liam and goal line technology and the video is from a lecture he gave earlier this year.