This joint interview with James Franck and Hertha Sponer-Franck was conducted as part of the Archives for the History of Quantum Physics project, which includes tapes and transcripts of oral history interviews conducted with circa 100 atomic and quantum physicists. Subjects discuss their family backgrounds, how they became interested in physics, their educations, people who influenced them, their careers including social influences on the conditions of research, and the state of atomic, nuclear, and quantum physics during the period in which they worked. Discussions of scientific matters relate to work that was done between approximately 1900 and 1930, with an emphasis on the discovery and interpretations of quantum mechanics in the 1920s. Also prominently mentioned are: Mrs. Bauer, Richard Becker, Raymond Thayer Birge, Max Bodenstein, Niels Henrik David Bohr, Max Born, Ode Clausius, Edward Condon, Dirk Coster, Richard Courant, Clinton Joseph Davisson, Peter Josef William Debye, Paul Drude, Dymond, Tatiana Ehrenfest, Paul Ehrenfest, Albert Einstein, Walter M. Elsasser, Paul Sophus Epstein, Enrico Fermi, Emil Fischer, Franck James, Walther Gerlach, Ladislas Goldstein, Fritz Haber, George Ellery Hale, Wilhelm Hanle, Werner Heisenberg, Herneck, Gustav Ludwig Hertz, David Hilbert, Johan Holtsmark, Hueckel, Christopher Ingold, Ernst Pascual Jordan, Martin Kamen, Felix Klein, Kunsman, Ferdinand Kurlbaum, Irving Langmuir, Max Theodor Felix von Laue, Philipp Lenard, Gilbert Newton Lewis, Frederick Lindemann, James Clerk Maxwell, Joseph Mayer, Lise Meitner, Robert Andrews Millikan, Rudolph Leo Bernhard Minkowski, Walther Nernst, Mrs. Nordheim, J. Robert Oppenheimer, Friedrich Paschen, Linus Pauling, Max Planck, Robert Wichard Pohl, Georg Quincke, Fritz Reiche, Heinrich Rubens, Carl Runge, H. Seeliger, Emilio Gino Segr,̈ Arnold Sommerfeld, Johannes Stark, Otto Stern, John T. Tate, Edward Teller, Woldemar Voigt, Otto Warburg, Victor Frederick Weisskopf, Wilhelm Westphal, Wilhelm Wien, Windaus, Robert Williams Wood; Berlin Colloquium in Physics, Berliner Physikalische Gesellschaft, Physikalische-Technische Reichsanstalt (Berlin), University of California at Berkeley, Universitt̃ Berlin, Universitt̃ Giessen, Universitt̃ Gt̲tingen, and Universitt̃ Heidelberg.