Ian Moult, a theoretical physicist at Yale University, continues his lecture series on energy correlators at the Institute for Advanced Study's Prospects in Theoretical Physics 2026 program. This third installment builds on earlier sessions, working through the formalism of energy correlators as observables for probing the structure of quantum field theory and collider physics, including their connection to jet substructure and the analytic structure of light-ray operators. Moult develops the calculations on the board, walking through the technical machinery step by step for an audience of graduate students and researchers already familiar with quantum field theory. The talk assumes substantial background from prior parts of the series and focuses on pushing the formalism toward concrete predictions relevant to collider experiments, keeping the discussion tightly focused on current research questions in perturbative QCD rather than offering a general introduction.