As the flagship journal of the world's largest association devoted to behavior analysis, The Behavior Analyst (TBA) exists to present leading edge theory and methodology of relevance to anyone who makes a home on the broad landscape of behavior analysis and behavioral science. As befits that mission, the papers in this issue stretch theoretical and conceptual boundaries and point to new collaborations and future directions in the field. We begin with a special section examining the concept of reinforcement, the nature of Applied Behavior Analysis (ABA) research, and strategies for disciplinary survival. The papers and commentaries addressing them, ask us to contemplate difficult and perhaps uncomfortable questions facing behavior analysis and behavioral science. We then move to our regularly scheduled programming with papers exploring neuroscience, multiple exemplar training, incarceration, and psychotherapy, along with a methodological paper and a memorial to a pioneering researcher. Of Jets and Sharks There is a scene in the classic film Annie Hall in which a couple on a bicoastal flight are discussing their relationship. One observes that a relationship is like a shark-it must keep moving forward or else it dies, and then concludes that what they have on their hands is essentially, a dead shark. A scientific discipline is much like that-it too must keep moving forward, otherwise it dies. The special section The Future of Behavioral Science and Behavior Analysis is a collective attempt to keep our shark moving, alive, and not turned into hákarl. Can We Afford Reinforcement? A target article by Killeen and Jacobs challenges what we think we may know about reinforcement, and makes a cogent argument to move beyond the well known A-B-C triplet to the quadruple O: S D-R I-R C. Their