Nemus steals an untested underwater mining device which could lead to unknown consequences. The Wonder Twins come to the rescue of a new Bear Club member who's initiation includes taking a photo of a bear at Lonesome Pine Cave. The Super Friends try to stop an attack by the Arthropods who had been banished for crimes on their home planet. Wonder Woman and Rima try to save three geologists who are sentenced to death for disturbing the sacred burial grounds of natives. Wonder Woman teaches how to use a crosswalk. Aquaman teaches a coin vanishing magic trick. Superman ...