Watch 'Shadowhunters' Previews Monday

Shadowhunters 3×21 “Alliance” & 3×22 “All Good Things…” Promo (Series Finale) – In the first part of the series finale, Clary comes up with a plan that will bring Shadowhunters and Downworlders together, as Alec struggles for a way to help Magnus.

Shadowhunters 3×22 “All Good Things…” (Series Finale) – In the second part of the series finale, 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.

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