While the Christchurch mosque attacks on 15 March 2019 were asserted to have changed New Zealand’s national security context, arguably the possibility of such an attack was foreseen, and, internationally, there was evidence of increasing risk of such attacks occurring. This paper explores the current state of international lone-actor research, and looks at how this can be applied in an endeavour to prevent future attacks in New Zealand. This paper combines an overview of the international lone-actor phenomenon, with New Zealand’s historical and contemporary terrorism context, and explores the extent that international research may have a bearing on current and future lone-actor terrorism risk here. It argues careful attention to identifiable indicators and protective factors, as well as local context, as essential in the contemplation of current and future attempts to pre-emptively identify and prevent potential lone-actor terrorism in New Zealand.