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'Shadowhunters' series finale puts a homicidal Jonathan amidst the Malec wedding we've been waiting for

While Clary has returned to her normal self again, Jonathan is still very much at large. Meaning, the series finale shows the final showdown between our shadowhunters and their biggest enemy.

This article contains spoilers for 'Shadowhunters' season 3 episode 20: 'City of Glass.'

Shadowhunters fans, buckle up. The end is finally here and the final hunt is about to begin in just a week's time when the Freeform fantasy series comes to the end of its three-year-long journey with an epic two-hour long finale to give you the closure you've been seeking.

The previous episode that aired on April 29, that is episode 20, 'City of Glass,' we saw the end of the dark force accompanying the life-force rune that had given us a dark Clary Fray - something that was absolutely thrilling to witness. But while Clary has returned to her normal self again, Jonathan Morgenstern is still very much at large. Meaning, the series finale shows the final showdown between our shadowhunters and their biggest enemy.

The plot synopsis for the two episodes being combined into the feature-length finale, reveals: "In part one (titled 'Alliance') Clary comes up with a plan that will bring Shadowhunters and Downworlders together, as Alec struggles for a way to help Magnus. In part two (titled 'All Good Things…') Jonathan begins his reign of vengeful terror as the Shadowhunters try to find a way to stop him. With only one hope, Clary must make a sacrifice that could have long-lasting implications for all. Meanwhile, wedding bells are in the air for one special couple.”

The two episodes are set to air back to back, so double trouble together!

While fans are eager to find out whether each of their favorite characters gets their due happily ever after or not, the trailer for the finale teases just enough to state that ambitious attempts will be made. Magnus Bane (Harry Shum Jr.) has entered the demonic realm, and as his now fiance, Alec Lightwood (Matthew Daddario) insists to the rest of the shadowhunters in the trailer, he sacrificed a lot to save the rest of them, so it is Alec's responsibility to get him back. With the proposal happening in the last episode, if all goes well, then the finale will be every reason for Malec fans to rejoice because wedding bells have been teased and the official trailer ahead of the season premiere had revealed that a wedding is for sure going to take place!

Meanwhile, as Jace Herondale (Dominic Sherwood) aka Clary's boyfriend tells her that they are fighting to love and live in peace, we see a whole new side to Jonathan in the background, with platinum blonde hair and all black clothing - feather-like extensions coming out of his sleeves. Back at the institute, Alec warns the shadowhunters that Jonathan is not the same person they knew as he is more powerful than ever. 

The biggest dilemma the trailer for the finale teases is yet another Clary-Jonathan face off, where Clary tries to stop her evil half brother from continuing on what looks like a killing spree. As she tries to fight for the only biological family she has remaining, Jonathan seems to have other plans.

He threatens Clary saying if she doesn't get off his path, he will end her too. So it will be really exciting to find out who emerges the winner in the end: does Clary sacrifice her own life in the pursuit to save the rest of the world? Or do each of them finally arrive at the happy ending they have been dreaming of?

Find out when 'Shadowhunters' returns with its series finale on Monday, May 6, at 8/7c, only on Freeform.