E6 - Atmospheric scientist Ella Gilbert investigates strange happenings in the ice, from galloping glaciers in Svalbard to exploding permafrost pingos in Siberia.
S8 E9 - Michael attempts to keep up with a Breton dance troupe and traces the voyage of 16th-century explorer Jacques Cartier, who claimed Canada for France.
S9 E7 - Hope realizes she's not prepared to rescue animals from an oil spill, so she heads across the continent to learn from the best before disaster strikes.