He has appeared in a number of popular of film and television shows but Alex is probably best-known for starring on the CBS series "Hawaii Five-0". ... Alex O'Loughlin Net Worth. Net Worth:$25 Million Salary:$200 Thousand Per Episode Date of Birth:Aug 24, 1976 (46 years old) Gender:Male Height:6 ft 1 in (1.8796 m) 2 more rows