The actress who portrayed Kyung Soon is from Vietnam rather than Korea, as the series' storyline (and her character name) would imply. As for the episode's storyline, it loosely follows the actor's own life experience in the Vietnam War just years before.
Kyung Soon was originally intended to be Hawkeye's love interest in multiple episodes. But due to the politics of the day, an interracial relationship was not received well by the public, and she did not film another episode.
Alan Alda's other favorite episode that he wrote, along with "Dear Sigmund"
Kyung Soon's car is a 1950/51 Plymouth Cranbrook 4 Door Sedan.
The string music playing during the dinner between Alan Alda and Kieu Chinh is Beethoven's String Quartet No. 13 in B-flat major, op. 130, 5th Movement, "Cavatina. Adagio molto espressivo".