In the Second Episode on Mechanical Diagnosis & Therapy (MDT)—formerly known as the McKenzie Method—Richard sits down with a heavyweight guest: David Oliver, PT, OCS, Dip. MDT. David is a senior faculty member with the McKenzie Institute and a clinician at the University of Michigan Spine Clinic. He walks us through his UK-to-U.S. journey, why MDT “clicked” after early Cyriax training, and what the diploma/residency was really like (think nine weeks, 15 patients a day, full immersion). David explains MDT as a language—you can attend A–D, but true fluency comes from consistent use, live patient problem-solving, and staying curious. We dig into credentialing vs. diploma, why classification before treatment is non-negotiable, and how “blending everything” can dilute outcomes. We also talk about the unique culture at PRO-PT: hosting MDT Courses, learning together, and fighting to preserve live patient demos in a post-COVID, more-online CE world. Tons of practical advice for clinicians: build MDT as your foundation, keep sharpening the tools, and be relentlessly interested in your patients.