In the emotional midseason premiere, everyone is dealing with the loss of Clary and are trying to move on best they can. Unbeknownst to them, the Shadowhunters face a new level of evil that they can't even imagine with the arrival of Jonathan Morgenstern, the true form of Clary’s brother.
With the loss of Clary after Lilith’s apartment exploded, Alec, Isabelle and Jace try to come to terms with what has happened. Glad to have their brother back, Alec and Isabelle are still worried about Jace, who is taking the actions of the Owl very hard. Magnus is also mourning the loss of his magic and finds himself in a new position—having to rely on others for help.
- 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
- See more here
- Filming for this episode began on January 22, 2018.
- The title "Lost Souls" partially shares the title with one of its main source materials, City of Lost Souls.
- The episode will be set a day after the end of the previous episode.
- Alec and Magnus will be babysitting Madzie in this episode.
- Show writer Bryan Q. Miller used the words "the knife" to tease the episode, suggesting that a knife may play an important role in this episode.
- The episode was initially slated to premiere on August 14, 2018 before it was pushed back to 2019 following the show's cancellation.
- ↑ 1.0 1.1 1.2 1.3 "Season 3B premieres Aug 14th on @FreeformTV @mattdirector directs a script by me & @DSwim #lostsouls #unclesbabysit" Todd Slavkin on Twitter (deleted; screenshot here)
- ↑ 2.0 2.1 "Season 3B has officially begun!" Matt Hastings on Twitter
- ↑ https://twitter.com/toddzer1/status/967283535680716800
- ↑ http://web.isan.org/template/1.2/publicSearch.do?code=0000-0004-1432-002C&nav=1
- ↑ 5.0 5.1 5.2 5.3 https://www.imdb.com/title/tt7365376/fullcredits?ref_=tt_cl_sm#cast
- ↑ https://twitter.com/mattdirector/status/958010680832962560
- ↑ "Production on 3B begins Jan 22." Todd Slavkin on Twitter
- ↑ "Next day after 310" Todd Slavkin on Twitter
- ↑ https://twitter.com/toddzer1/status/972332773800202240
- ↑ https://twitter.com/toddzer1/status/1038343548662308864
- ↑ "311 the knife" Bryan Q. Miller on Twitter
- ↑ Shadowhunters on Netflix (on mobile; removed in May 2018)