This article is from the ER FAQ, by Rose Cooper email@example.com with numerous contributions by others.
Even though she became a main character in the second
season, Kerry Weaver sort of sticks out because the writers have
rarely shown a non-work-related side of her life. One stark
exception was in the Christmas episode "A Miracle Happens Here"
Kerry had planned on working through the holidays, until
she received a surprise visitor in the ER. A man whom
Kerry called "Mlungisi" came in, and the two started kissing and
hugging as if they were an old couple. Kerry thereupon announced
that she would not be working the holidays after all; apparently
Mlungisi had flown in from somewhere in Africa to visit her for
Christmas at the last minute.
When asked about him later, Kerry replied cryptically, "I
had a farm in Africa...", mimicking Meryl Streep from the movie "Out
of Africa" (in which Streep played a Danish baroness who lived in
Kenya for a time).
Mlungisi has never been mentioned or seen on any other
episode; that`s long-distance relationships for you.