 The show aired on Spain's Cuatro channel from launch until June 2011 and is now broadcast on Antena 3.Recurring guests on the show include Luis Piedrahita, Raquel Martos, Marron & El Hombre de Negro ("The Man in Black") (the scientists), and puppet ants Trancas and Barrancas (from the Spanish expression "a trancas y barrancas," which means "in fits and starts").It has proved a ratings success, and has expanded from a weekly 120-minute show to a daily 40-minute show in its third season, which began on 17 September 2007.