'Shadowhunters' season 3 episode 20 spoilers tease an epic showdown between siblings Clary and Jonathan vs. the Lightwoods

With Clary turning over to the dark side completely, the upcoming episode 20 titled 'City of Glass' promises both action and tension in equal parts
PUBLISHED APR 24, 2019

This article contains spoilers for season 3, episode 19 'Aku Cinta Kamu'.

It's a big week for 'Shadowhunters' fans and this is not the time to keep calm. Over the last nine weeks, we have seen the third and final season get darker with each episode and as our protagonist, Clary Fray (Katherine McNamara) gives into the dark side, the upcoming episode 20 titled 'City of Glass' promises both action and tension in equal parts. 

The trailer for the upcoming episode is a major reminder that initially, this very episode was supposed to be the series finale before Freeform decided to go ahead and plan an additional two-hour-long finale to give fans the closure they need. But while some major loose ends get tied, the episode also opens up a whole other set of sub-plots, something that will leave fans on the edge of their seats anticipating the big finale.



 

The trailer starts off with the impending fight between the Morgenstern siblings and the Lightwood siblings. Meaning, Clary and her evil brother, Jonathan Morgenstern (Luke Baines) will be fighting against Jace Herondale (Dominic Sherwood) and Izzy Lightwood (Emeraude Toubia.) The fight happens after Clary and Jonathan manage to abduct the Seelie Queen and acquire the Morningstar Sword, but team lightwood, on the other hand, has been able to forge the Glorious sword which has the Heavenly Fire serum, capable of severing Clary and Jonathan's bond from the life-force rune.

The biggest tease in the trailer, however, arrives in the form of what looks like a kiss between Jonathan and Clary, which even though sounds wrong and creepy, has to come with some explanation. We already know that the two share the same father and were born of different mothers. They were together when they were little kids but were soon separated and then grew up without any contact with each other, until this season of the show. Either way, it is still pretty weird because so far we have seen Jonathan treat Clary like a little sister, but then again, he does get pretty jealous whenever Jace - aka Clary's boyfriend - is third wheeling with them so maybe this kiss is him finally acting on that latent rivalry Or whatever evil plan is brewing in his brain currently. 



 

In other news, we see a heartbroken Magnus Bane (Harry Shum Jr.) indulging in his father, Asmodeus' plans of controlling the entire demonic realm together. But the reason behind Magnus' heartbreak, his ex - Alec Lightwood (Matthew Daddario) - will be seen executing his duties as the head of the shadowhunters' Institute without even bothering to find out whether Magnus has regained his powers or not. 

Speaking of exes, Maia Roberts (Alisha Wainwright) and Jordan Kyle (Chai Hansen) - who have rekindled their romance - are fronted with the dilemma of choosing a mundane life over the werewolf life. As Jordan asks Maia to consume the Heavenly Fire serum to turn them into mundanes, she struggles to make a decision between love and her responsibilities as the newly appointed alpha of her werewolf pack. Luckily, the former alpha, Luke Garroway (Isaiah Mustafa) will arrive just in time to offer his signature fatherly advice that will probably help Maia see things more clearly. Sadly, that can't be said for Clary, who is still pretty much reeling under the impact of the life-force rune, so let's hope in episode 20 her friends are finally able to retrieve her before something worse happens.

'Shadowhunters' returns with season 3, episode 20 'City of Glass' on Monday, April 29, at 8/7c, only on Freeform.

RELATED TOPICS SHADOWHUNTERS

GET THE BIGGEST ENTERTAINMENT STORIES
STRAIGHT TO YOUR INBOX.

MORE STORIES

The 'Stranger Things' series finale is set to drop on New Year's Eve and will be two hours and eight minutes in duration
2 hours ago
Although ‘Heated Rivalry’ was renewed early for season 2, creator Jacob Tierney says fans shouldn’t expect new episodes anytime soon.
2 hours ago
As ‘Stranger Things’ nears its finale with Season 5, a chilling fan theory may finally explain what the Upside Down truly is.
2 hours ago
'Stranger Things' Season 5 Volume 2 will premiere on Netflix on Thursday, December 25
11 hours ago
Set to premiere in 2027, the show is officially a full reboot of J.K. Rowling's beloved novels
11 hours ago
The zombie apocalypse series centers on a group of students who find themselves trapped inside their school, fighting to survive the deadly outbreak
13 hours ago
While 'Bridgerton' Season 4 is set to premiere on Thursday, January 29, 2026, fans can watch the first episode on Wednesday, January 14
13 hours ago
‘Stranger Things’ Season 5 drops it's penultimate set of episodes on Netflix on Christmas Day
20 hours ago
Rhea Seehorn explains what Carol’s choice means and how it changes the story moving forward to Season 2
1 day ago
Netflix has secured a new MGM deal to stream all 10 seasons of 'Stargate SG-1', bringing the iconic sci-fi series back into orbit
1 day ago