|Profession:||HPD: Police Officer|
Matthew Williams (d. 2014)
|Played by:||Scott Caan|
|Seasons:||NCIS: Los Angeles: 3|
Hawaii Five-0: 1, 2, 3, 4, 5, 6
|First episode:||"Pilot (Hawaii Five-0)"|
Daniel "Dan" Williams is a former HPD Police Officer who is now the second-in-command of the Hawaii Five-0 Task Force led by Steven McGarrett.