Going into harm's way, Dr Carter returns to the Congo to search for a colleague's corpse despite the chaos and danger of a civil war.
Carter and Kovac vaccinate people at a jungle outpost in Congo, where they find themselves in the line of fire between warring factions.
Dr Carter celebrates Christmas at a Congolese medical clinic, wrangling over meagre supplies and confronting anti-Americanism, but he falls for an AIDS worker named Makemba.
Bo enlists the help of Dyson to find an artefact she believes will release Lauren from her life of servitude to the Fae.
The team attempt to save a criminal profiler who's mind is being controlled by a powerful serial killer.