The Gruenaks that the Chamberlain presents to the Scientist as gifts are based on an early prototype creature called the "Miner" that was developed for The Dark Crystal (1982). Jim Henson performed the Miner during early screen tests, but the entire race was eventually written out of the story before production on the actual film began.
The original version of skekTek that the Scientist built for The Dark Crystal (1982) had a mechanical eye that was built out of the chassis of a 1978 Kenner Star Wars die cast Imperial Tie Fighter toy. The new version is equipped with one built out of the same vintage toy.
Maudra Fara of Stone-in-the-Wood is also known as "The Rock Singer."
The title is a quote from the prophecy Jen and Kira find in The Dark Crystal (1982) that explains their quest to return the shard to the crystal.