Shadowhunters The Mortal Instruments 3 - Episode 22 - Alliance; All Good Things... Part 2

Part 1 

Part 2 

Part 3

Part 4

Jonathan begins his reign of vengeful terror, and the Shadowhunters try to find a way to stop him; Clary must make a sacrifice that could have long-lasting implications for all; wedding bells are in the air for one special couple.