Draft paper and podcast: "Agency & Two-Way Powers" by Maria Alvarez (KCL). This talk was delivered to the Aristotelian Society on 10 December 2012. Before coming to King’s College London, Maria Alvarez was a lecturer at the University of Southampton, having previously taught at the universities of Oxford and Reading. Maria is also a member of the Executive Committee of the British Philosophical Association. Her research interests include the philosophy of action, including the metaphysics and explanation of actions, reasons for action, agent causation, and the problem of free will and moral responsibility. The recording of this talk was produced by Backdoor Broadcasting Company in conjunction with the Institute of Philosophy, University of London. The final version of his draft paper will be published in Issue No. 1 of the 2013 Proceedings of the Aristotelian Society, Volume CXIII. Please visit our website for further information.