Actor James MacArthur, who is best known for his role as Danny “Danno” Williams in the original version of “Hawaii Five-O”, has passed away of natural causes at the Mayo Clinic in Jacksonville, Florida on Thursday (October 28).

The 72 year-old actor (December 8, 1937 – October 28, 2010) was the adopted son of Charles MacArthur and actress Helen Hayes. James is survived by his third wife, H.B. Duntz, and four children and six grandchildren.

R.I.P. James MacArthur.