This chapter explores that this is not exactly what actor-network theory (ANT) in any of its varieties proposes, nor is it a sufficient account of what theoretical perspectives drawing on ANT can offer planning analysts. It sets out the origins and development of ANT thinking, explain the key concepts and discuss the mode of argumentation and research implied by adopting an ANT perspective The chapter outlines some possible trajectories for ANT research within planning studies and identifies, deliberation as a practice and deliberative democracy as an ideal have been hugely influential within planning theory. The discursive construction of knowledge claims was considered worthy of attention, including the detailed processes by which scientific institutions worked and thus the early work of Bruno Latour concerned detailed ethnographic studies of laboratories. The account of network dynamics so far could apply to many relational perspectives. Where ANT and also assemblage thinking differ is that they include non-human elements as actors.