An engineer is shot and killed, his body found in a Mars simulation chamber at the company where he worked. The team soon learns that the engineer competed in an underground fight club... and Cameron puts his life on the line to follow the trail and compete.

The team investigates the mysterious death of a retired Air Force officer in the middle of the desert, of no apparent cause. Meanwhile, Cameron reaches out to someone he'd rather not to analyze Kirsten's neural patterns, and Kirsten discovers that Ivy is in contact with Daniel.