Performers include: James G. Richardson, Ernest Thompson
Description: The show derived its name from its setting, the fictional Sierra National Park, a part of the U.S. National Park Service. In reality, exteriors were filmed at Yosemite National Park. The tenth episode, "The Urban Rangers", established that the park also existed within the same fictional world populated by the characters of Emergency!, its sister Mark VII show. The two paramedic characters from Emergency!, played by Kevin Tighe and Randolph Mantooth, also appeared in Sierra "The Urban Rangers".
