Hosts Phil Thompson and Eric Armstrong work their way across the Pulmonic Consonant Chart, focusing in on the Fricative row. Though they do cover English fricatives [\u03b8 \xf0 f v s z \u0283 \u0292], they go into much greater depth on the non-English sounds [\u0278 \u03b2 \u0282 \u0290 \xe7 \u029d x \u0263 \u03c7 \u0281 \u0127 \u0295 \u029c \u02a2 h \u0266 ]. (note that they follow the IPA chart on the wikipedia page, which sort of blends the very back fricatives with the approximants.)