Pluto (mythology) designed a set with a rotating mountain that opened up to reveal Pluto emerging from the underworld; the drawing survives and was the basis for a modern recreation. The tragic descent of the hero-musician Orpheus to the underworld to retrieve his bride, and his performance at the court of Pluto and Proserpina, offered compelling material for librettists and composers of opera (see List of Orphean operas) and ballet. Pluto also appears in works based on other classical myths of the underworld. As a singing role, Pluto is almost always written for a bass voice, with the low vocal range representing
The Sleestak God "Sleestak god") still alive. Once they reach safety, Rick reminds the children that they still need to get the water. Television historian David Hofstede labeled the introduction of the Sleestak as one of the "great moments" in the series. Film historian Hal Erickson praised "The Sleestak God" for keeping Cha-Ka's leg broken from the previous episode, saying ""That's" what we mean by good continuity." The online review site Premium Hollywood described "The Sleestak God" in 2009 as slow, saying that "not much happens." It added that the addition of the Sleestak, however, was worthwhile, calling them "creepy as hell". The