Douglas Fargo — usually referred to as simply "Fargo", occasionally "Doctor Fargo" and "Doug" to Claudia Donovan — is a resident of Eureka, Oregon and an employee of Global Dynamics, the research facility in Eureka. Fargo often acts as an assistant to Doctor Nathan Stark, the director of Global Dynamics. Fargo has been connected to several separate development projects in Eureka, including SARAH (Self Actuated Residential Automated Habitat) and the "Neural Interface System".

Fargo plays a key part in episode 13.1 from Season 2, in which a computer virus is triggered that causes a lockdown of the Warehouse, trapping everyone inside. He also plays a pivotal role in the episode Don't Hate The Player, when he gets trapped in a game he himself created (and based on Warehouse 13), and then augmented using an artifact.

In 13.1 Hugo One declares that Fargo's then-GD profile contained 'the phrase "inappropriately pushed button" thirty-eight times'.

When Claudia visits Eureka in the episode (of that show) "Crossing Over" 'Dougie' really rolls out the red carpet and pulls out all the stops, seemingly in the hope she might stick around for a while. That doesn't happen, but Claudia does snag an artifact and give Fargo a smooch he won't soon forget.