The Train Job - S1.E2

Crime lord Adelai Niska hires the crew to rob a train of unspecified goods. The crew can transfer the goods to Serenity flying above, but Mal and Zoe Washburne are forced to stay behind on the train. They learn that they have stolen medicine desperately needed by the locals. The crew argues whether they should deliver the goods to Niska. Ultimately, they decide to rescue Mal and Zoe first through subterfuge.