Upsidaisium is the first story arc from the second season of Rocky and His Friends. With 36 segments it was the second-longest of all Rocky and Bullwinkle story arcs, and concerns Rocky and Bullwinkle's efforts to reclaim Bullwinkle's Uncle's Upsidaisium mine. It was broadcast on ABC during the 1960-61 television season on Sundays, concurrently with Metal-Munching Mice on Thursdays