Which character does Alex O'Loughlin play in "Hawaii Five-O"?
Alex O'Loughlin Alex O'Loughlin (born 24 August 1976) is an Australian actor, who plays Lieutenant Commander Steve McGarrett on CBS' remake of the TV series "Hawaii Five-0". He had starring roles in the films "Oyster Farmer" (2004) and "The Back-up Plan" (2010), as well as on such television series as "Moonlight" (2008) and "Three Rivers" (2009).
Herman Wedemeyer Herman John Wedemeyer (May 20, 1924 – January 25, 1999) was an American actor, football player, and politician. He is best known for portraying Sergeant/Detective "Duke" Lukela on the crime drama "Hawaii Five-O" (1972–1980). However, he appeared on the first episode of Hawaii Five-O as Lt. Balta of HPD.