Discovery+1 California Cob House. A group of off-grid-living enthusiasts come together to build a 300-square-foot bungalow in California with a variety of eco-friendly features. S4, Ep1 2026-08-07 Mountain Cottage. A cannabis farmer teams up with a bio architect and hemp expert to build an off-grid hemp cottage in the Coast Range mountains of California. S4, Ep2 2026-08-07 The Heart Of A Pit Bull. A young man's pet goat is injured in a freak accident. Can Dr. Jeff help? Plus, Gus, a dog, has swallowed a mysterious object and has been unwell since. S4, Ep6 2026-08-07 Lily's Puppy Mill Rescue. A dog with a rare disease needs life-saving surgery - one that Dr. Jeff has never done before. Plus, a cat has a mysterious injury. Can the team help? S4, Ep7 2026-08-07 Find out how balloons, wallpaper, frozen chips and incandescent light bulbs are made, as more everyday items are put under the microscope. S7, Ep4 2026-08-07 Find out how matches, carousel horses, fine porcelain, and car fuel tanks are made, as more everyday items are put under the microscope. S7, Ep5 2026-08-07 Find out how glass cookware, bars of soap, steel drums and fire fighter's uniforms are produced, as more everyday items are put under the microscope. S7, Ep6 2026-08-08