Where to Find Harkness in Fallout 3 (Xbox 360)?

You won’t find Harkness in Fallout 3—because he doesn’t exist in that game. Harkness is a major character in Fallout 4 (the android detective in Diamond City). He is absent from the Capital Wasteland entirely.

If you’re thinking of a different Fallout 3 character—perhaps Zimmer (the Institute scientist from the Fallout 4 quest “The Replicated Man” who appears in a Fallout 3 mod), Harkness from a mod, or someone else—let me know the details and I’ll point you to the right location.