<P> James Gordon MacArthur ( December 8 , 1937 -- October 28 , 2010 ) was an American actor best known for the role of Danny `` Danno '' Williams , the reliable second - in - command of the fictional Hawaiian State Police squad in the long - running television series Hawaii Five - O . </P>
<P> James Gordon MacArthur ( December 8 , 1937 -- October 28 , 2010 ) was an American actor best known for the role of Danny `` Danno '' Williams , the reliable second - in - command of the fictional Hawaiian State Police squad in the long - running television series Hawaii Five - O . </P>
who played danno in the original hawaii five o
who played danno in the original hawaii five o
James Gordon MacArthur
James Gordon MacArthur