City of Glass is the twentieth episode of the third season of Shadowhunters: The Mortal Instruments.


Alec, Jace and Isabelle make a plan to finally get Clary back and stop Jonathan—much to Luke's and Simon's chagrin. Meanwhile, an emotionally raw Magnus struggles to deal with his father's reappearance and Maia must make a tough decision that could affect the rest of her life.




See more here
TMI 3x20 Promo Preview

TMI 3x20 Promo Preview

Demons attack Idris.


See more promotional images here and stills here


A list of the songs and score music featured in this episode:

  • "Part of Me" - Gold Brother
  • "The Push" - DYAN
  • "The Ending" - Wafia feat. Finneas
  • "Bridges" - Aisha Badru
  • "Romance. Andante from Eine kleine Nachtmusik, K.525" - Leonard Bernstein & New York Philharmonic


  • The 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.
  • Some of the exterior shots set in Alicante in this episode were filmed in Paris.[1][2]
  • Parts of this episode was changed following the cancellation of the series and the creation of the two-part finale. This episode was originally supposed to end with a cliffhanger that was since incorporated into the finale episodes.[3]


Community content is available under CC-BY-SA unless otherwise noted.

Fandom may earn an affiliate commission on sales made from links on this page.

Stream the best stories.

Fandom may earn an affiliate commission on sales made from links on this page.

Get Disney+