Top of the Lake has an all-male cast.
Elisabeth Singleton Moss ( born July 24 , 1982 ) is an American film , stage , and television actor . She is known for her roles as Zoey Bartlet , the youngest daughter of President Josiah Bartlet , on the NBC television series The West Wing ( 1999 -- 2006 ) ; Peggy Olson , secretary-turned-copywriter on the AMC series Mad Men ( 2007 -- 15 ) , which earned her six Emmy Awards nominations and one Golden Globe nomination ; and Det. Robin Griffin in the BBC miniseries Top of the Lake ( 2013 ) , a role which won her a Golden Globe and Satellite Award for Best Actress in a Miniseries or TV film . Top of the Lake . The series follows Detective Robin Griffin ( Elisabeth Moss ) , and Season 1 deals with the investigation of the disappearance of a pregnant 12-year-old girl in New Zealand .