"SPAWNING HOPES" "PREYING IN THE GARDEN" "SEARCH & RESCUE" In the first part of this three-part episode, Lin Haven River is explored. The river was once full of oysters, but now it is not due to the river being full of oyster killing parasites. Oysters help improve the water quality of the Chesapeake Bay. Scientists are spawning oysters in a hatchery to help create oysters which are immune to disease to help to one day repopulate the bay. Part two focuses on preying mantises. Preying mantises are sit and wait predators in which their prey has to be moving for the preying mantises to sense it. Climate change may be affecting preying mantis's populations. In part three, the focus is on search and rescue dogs. These dogs, known as air scent dogs, can find people drowning under the water, and can sniff out people missing in the woods from miles away. The dogs go through an extensive up to two-year training program to learn how to find missing victims on both land and sea.