Star Trek: Enterprise (2001)

S2E6 Marauders

The Enterprise docks at a Quonset mining colony to replenish its deuterium supply. Upon arrival, the crew finds that Klingons are coercing the colonists into surrendering their entire stock of deuterium. Determined to help, Archer and his team take it upon themselves to train the colonists, empowering them to stand up and resist the Klingon threat.