This week on WGCU TV

Wednesday, April 22

CARRIE VONDERHAAR / OCEAN FUTURES SOCIETY/KQED Jean-Michel Cousteau with "Rakey," a small female orca found stranded on an isolated beach. . Secrets of the Dead - Blackbeard's Lost Ship - at 8 p.m.

Off the coast of North Carolina, marine archaeologists have discovered the remains of the Queen Anne's Revenge, the pirate Blackbeard's flagship.

. Jean-Michel Cousteau: Ocean Adventures - Call of the Killer Whales - Part 1 - at 9 p.m.

Though they number fewer than 100,000 worldwide, orcas, also called killer whales, extend from the Arctic to the Antarctic, and learning more about them is a global endeavor. Thursday, March 23

. Mystery! - Miss Marple: The Body in the Library - Part 1 and 2 - at 9 p.m.

A gorgeous blonde turns up dead in the most unlikely place: the library of the irreproachable Colonel Arthur Bantry and his vivacious wife, Dolly.

Friday, April 24

. Untold Stories - Protecting Paradise: Collier County Conservation - at 8:30 p.m.

For more than a century, dreamers and schemers have tried to drain and claim the Everglades. In Collier County, on the western edge of the Everglades, plume hunting, clear-cutting of ancient cypress trees, development of the "world's largest subdivision" and the "world's largest supersonic jetport" near Everglades National Park, inspired a groundswell of grassroots efforts to protect the vanishing wet wilderness.

Saturday, April 25

. Last of the Summer Wine - Some Enchanted Evening - at 10 p.m.

Sunday, March 26

. Nature - Crash: A Tale of Two Species - at 8 p.m.

This is a story of the interconnection of life, how every species is important, no matter how big or small. At the center is the humble horseshoe crab, a creature that has remained virtually unchanged for 300 million years.

Monday, April 27

. Antiques Roadshow - Grand Rapids - Hour 2 - 8 p.m.

Modernist furniture at the Grand Rapids Public Museum; a quilt signed by 200 celebrities and dignitaries; a turn-of-the-century cold-air return cover made by the Tiffany Glass and Decorating Company; and a collection of wooden fish decoys.

. American Experience - We Shall Remain: Trail of Tears - Part 3 of 3 - at 9 p.m.

The Cherokee embrace of "civilization" and their landmark Supreme Court victory upholding tribal sovereignty proved no match for white power. The Cherokee people were able, with characteristic ingenuity, to build a new life in Oklahoma, far from the land that had sustained them for generations.