Lawrence Millman is a mycologist and author of numerous books, including Our Like Will Not Be There Again, Fascinating Fungi of New England, and At the End of the World. He has done mycological work in places as diverse as Greenland and Fresh Pond in Cambridge, Massachusetts, where he has documented 321 different species.

Al Kessel is a full-time narrator and voice actor currently living in Arizona, where he works from his professional home recording studio.