- Katherine McNamara as Clary Fairchild
- Dominic Sherwood as Jace Herondale
- Alberto Rosende as Simon Lewis
- Matthew Daddario as Alec Lightwood
- Emeraude Toubia as Isabelle Lightwood
- Alisha Wainwright as Maia Roberts
- Isaiah Mustafa as Luke Garroway
- Harry Shum Jr. as Magnus Bane
- The current working title of the episode is a reference to Alicante—which is sometimes referred to as the City of Glass—as well as the title of the third installment of The Mortal Instruments book series.
- Show writer Bryan Q. Miller used the words "the sky" to tease the episode.
- ↑ ‘Shadowhunters’ To End After 3 Seasons, Freeform Orders 2-Hour Finale To Wrap Series In 2019 | Deadline
- ↑ 2.0 2.1 https://twitter.com/mattdirector/status/983413585840713728?s=19
- ↑ http://web.isan.org/template/1.2/publicSearch.do?code=0000-0004-1432-0035&nav=1
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 https://www.imdb.com/title/tt7370774/fullcredits?ref_=tt_cl_sm#cast
- ↑ "320 the sky" Bryan Q. Miller on Twitter