“We are thrilled to be coming back. It seems hardly no time at all when we decided to do the show. Now, we are taping our fourth season,” said “Bluegrass Underground” television producer Todd Jarrell after announcing the fourth season lineup for PBS’s Emmy-winning “Bluegrass Underground” series which will be taped March 7-9, 2014, in the Volcano Room of Cumberland Caverns.Jarrell said, “This promises to be another great week and another great season.