A typical episode centered on the ER, with most scenes set in the hospital or surrounding streets. In addition, most seasons included at least one storyline located completely outside of the ER, often outside of Chicago. Over the span of the series, stories took place in the Democratic Republic of The Congo, France, Iraq and Sudan. One early storyline involved a road trip taken by Dr. Ross and Dr. Greene to California and a season eight episode included a storyline in Hawaii featuring Dr. Greene and Dr. Corday. Beginning in season nine, storylines started to include the Democratic Republic of the Congo, featuring Dr. Kovac, Dr. Carter, and Dr. Pratt. "We turned some attention on the Congo and on Darfur when nobody else was. We had a bigger audience than a nightly newscast will ever see, making 25 to 30 million people aware of what was going on in Africa," "ER" producer, John Wells said. "The show is not about telling people to eat their vegetables, but if we can do that in an entertaining context, then there's nothing better." The series also focused on sociopolitical issues such as HIV and AIDS, organ transplants, mental illness, racism, human trafficking, euthanasia, poverty and gay rights.