Harkness is the Chief of Rivet City Security. When first entering, past the Intercom, he is the one who greets the player and allows him in. He carries a unique weapon named the A3-21 Plasma Rifle and it can be obtained by completing the quest below in a certain way.
 The Replicated Man
- Main Article: The Replicated Man
In this quest he is revealed to be an android who received facial reconstruction surgery and a memory swap from Pinkerton after escaping the Commonwealth. Dr. Zimmer is looking for Harkness, and you have the choice of helping Zimmer or not.
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