Captain Jonathan Archer ( Scott Bakula ) , Sub @-@ Commander T 'Pol ( Jolene Blalock ) , and Commander Charles " Trip " Tucker III ( Connor Trinneer ) fly down to a small colony of 76 miners in order to trade for deuterium . They initially try to barter with Tessic ( Larry Cedar ) , the colony 's leader , but he appear reluctant to part with any of the 80 @,@ 000 liters in inventory , which is being held for ' someone else ' . After negotiations however , a deal is struck − 200 liters of deuterium for four power cells and whatever medical supplies Enterprise can spare , on the proviso that the Enterprise crew can fix two offline pumps in two days .