Tour guide

A tour guide is one who provides assistance, information and cultural, historical and contemporary heritage interpretation to people on organized tours and individual clients at educational establishments, religious and historical sites, museums, and at venues of other significant interest.

On The Flash, actress Darla Taylor played a tour guide from the alternate reality known as Earth-2. In the second episode of season two, "Flash of Two Worlds", she led a group of children through the public wing of S.T.A.R. Labs. They had an unexpected chance encounter with the facility's founder, Harrison "Harry" Wells.