ABSTRACT- The purpose of this paper is to offer a critical assessment of the way in which the internet and online material features as part of the process individuals embark on to plan acts of terrorism. The paper begins by evaluating concepts used to describe the role of the internet in the context of terrorism and political violence before analysing a single case study in detail in order to explore particular nuances that emerge which shed light on the relationship between perpetrator on the one hand and online content and behaviour on the other. The case study, in turn, is developed into a conceptual appraisal of terrorist use of the internet. The paper concludes by exploring the important distinction between the “theoretical” application of online learning as set out in terrorist propaganda and the hurdles that individuals face in practice.