The Thesis Review picks an unusual starting point for a research interview. Instead of a guest's newest paper, the anchor is their PhD thesis. Sean, the host, treats that document as a fixed point and traces the line forward: what the guest set out to do, what the field did next, and what still holds. In some introductions he describes himself as a postdoctoral researcher at the University of Washington working on machine learning methods for generating and reasoning with natural language. That shows in the questions, which are specific and technical but give the guest room to tell how the work came about. The guest list reaches across computer science. Tianqi Chen, introduced as a pioneer where machine learning meets systems, recalls building an open-source framework around computational graphs, automatic differentiation and CUDA acceleration, and the work of scaling training to more devices. Niloofar Mireshghallah, a postdoctoral scholar at the University of Washington, takes up privacy and safety in large language models, including a 2020 paper by Nicholas Carlini and collaborators that extracted full sequences from GPT-2 by sampling heavily and re-ranking the results. Yulia Tsvetkov describes multilingual NLP moving from a few good translation systems for major languages toward dialects, language varieties and translation built for a particular population. Hady Elsahar credits prompting with turning language models from sentence completers into tools that can answer questions and do math. Swarat Chaudhuri argues that a neural network is a low-level program embedded in human-written code, which brings formal methods and property specification into play for systems like self-driving cars. The episode names alone show the spread, from 'Learning to Map Sentences to Logical Form' to 'Linguistic Knowledge in Data-Driven NLP' to 'Logics and Algorithms for Software Model Checking'. Comparing then with now is what holds each conversation together. Luke Zettlemoyer says dialogue drove the final part of his thesis even though, by his account, he wrote few if any papers on it, and that what context means for language understanding is still wide open. Tsvetkov admits she had to refresh her memory of her own dissertation. Mireshghallah says that talking about her work lets her step outside it and see it from a new angle, a remark Sean calls the thesis of the show itself. The mood is friendly. Sean tells Elsahar he is a big fan of his work and hears the same line back. Several episodes end on advice for people starting a PhD. Chen's version is that five years is long enough to try something bold. Zettlemoyer's is to think about how to be different and have an impact others could not, and Sean notes that no two researchers have answered the same way.