"The Cove" also earned the accolade for documentary screenplay at the WGA awards ceremonies in Los Angeles and New York this past weekend.
The writing team behind "Mad Men" won the WGA prize for drama series writing and the scribes at "30 Rock" won the award for scripting a comedy series.
The writers of "Modern Family" were also recognized with the award for writing a new series.
NBC reportedly holds celebs hostage to Jimmy Fallon's show
Millions of Getty images now available for free via embed tool