Across two oceans and more than two years, marine biologist and filmmaker Rick Rosenthal set out to capture on film the biggest, fastest, most dangerous gamefish in the sea -- the ancient and amazing creatures known as billfish. NATURE tracks Rosenthal's pursuit of these coveted sea creatures in ³Superfish," premiering Sunday, May 4 at 8 pm ET on PBS (check local listings). Academy Award-winning actor F. Murray Abraham narrates the film, part of the 26th season of the Peabody and Emmy award-winning series produced by Thirteen/WNET New York for PBS. Major support provided by Canon U.S.A. Inc., Toyota, and the Corporation for Public Broadcasting. For more information, visit http://www.pbs.org/nature