Explore the intricate relationship between complexity and gravity in this advanced physics lecture by renowned physicist Leonard Susskind. Delve into topics such as firewalls, time, TWCrossover, complexity growth, and the connection between complexity and entropy. Examine concepts like maximum entropy, state complexity, and computational work as they relate to gravity. Gain insights into the frontiers of theoretical physics, including the complexity of G and incomplete complexity. Part of the Prospects in Theoretical Physics 2018 series, this talk offers a deep dive into cutting-edge ideas at the intersection of quantum information theory and gravitational physics.