1 Lecture 1: Introduction to Einstein, Oppenheimer, Feynman: Physics in the 20th Century 2 Lecture 2: Faraday, Thomson, and Maxwell: Lines of Force in the Ether 3 Lecture 3: Worldviews, Wranglers, and the Making of Theoretical Physicists 4 Lecture 4: Waves in the Ether 5 Lecture 5: Einstein and Experiment 6 Lecture 6: Reception of Special Relativity 7 Lecture 7: A Political History of Gravity 8 Lecture 8: Rethinking Light 9 Lecture 9: Rethinking Matter 10 Lecture 10: Matrices and Uncertainty 11 Lecture 11: Waves and Probabilities 12 Lecture 12: Quantum Weirdness: Schrödinger’s Cat, EPR, and Bell’s Theorem 13 Lecture 13: Physics under Hitler 14 Lecture 14: Radar and the Manhattan Project 15 Optional Discussion: The Day After Trinity 16 Lecture 16: Secrecy and Security in the Nuclear Age 17 Optional Discussion: Containment 18 Lecture 18: Coldwar Classroom: Teaching Quantum Theory in Postwar American Physics 19 Lecture 19: Counterculture and Physics 20 Lecture 20: A Conservative Revolution: QED and Renormalization 21 Lecture 21: Teaching Feynman's Tools: The Dispersion of Feynman Diagrams in Postwar Physics 22 Lecture 22: Quarks, QCD, and the Rise of the Standard Model 23 Lecture 23: The Birth of Particle Cosmology 24 Lecture 24: The Big Bang, Cosmic Inflation, and the Latest Observations 25 Lecture 25: String Theory and the Multiverse