Mythology is the latest show from Celtic Thunder and the show's 9th special for Public Television. Filmed on location at the Helix Theater in Dublin (where they filmed their debut show in 2007), it's fitting that Celtic Thunder have chosen to return to their roots in order to film this musical odyssey back to the heart of the Celt. The opening number for Mythology is an original piece called Voices written expressly as an opener for the new show.