Six characters from Jules Verne's books, all featured in his play "Journey Through the Impossible": *T. Artelett (renamed Tartelet for the play), "The School for Robinsons" *Doctor Ox, "Dr. Ox's Experiment" *Lidenbrock, "Journey to the Center of the Earth" *Nemo, "Twenty Thousand Leagues Under the Sea" *Ardan, "From the Earth to the Moon" *Hatteras (mentioned only), "The Adventures of Captain Hatteras"