This 3-part seminar will focus on the interaction of ideas and clinical practice between the theories of Carl Jung and Wilfred Bion. Major concepts of the Jungian and Bionian models will be discussed as well as identifying the points of convergence, divergence, and complementation between the theories of Bion and Jung. Conceptual ideas of contemporary Bionian theorists, in particular Thomas Ogden, Antonino Ferro, and Giuseppe Civitarese, three of the most influential writers in the contemporary psychoanalytic world, will also be discussed. Implications for clinical practice will be explored, including case material used to illustrate differences in Jungian and Bionian approaches to unconscious process.