S10, E10: On Christmas Eve, the chilly emergency room staffers do their best to observe the holiday while a crusading Carter does the same--half a world away in a rundown Congolese medical clinic. Flashbacks reveal his relationship with Makemba "Kem" Likasu (recurring guest star Thandie Newton - "Mission: Impossible 2"), a beautiful African AIDS worker, as their clashes over meager resources slowly give way to a deep love affair. As Carter adjusts to the heat, filth and dangers of the region, he keeps in touch with his Chicago friends and embarks on a personal mission to help a pregnant mother who is dying of AIDS. Despite the anti-American sentiments of his French comrades, Carter remains determined to bring the joy and love of Christmas to the local children of Kisangani. Emmy Award-winning executive producer John Wells wrote the episode.