Love may turn people into heroes, but it can also turn them into villains.
There are many television characters who undergo complete transformations for a person they care about, but the change isn't always a postive one.
Related: 31 Characters Who Fail at Being "Just Friends"
We created a slideshow below of 19 times love unleashed evil!
Bellamy and Clarke - The 100
The lengths that Bellamy and Clarke will go for each other is incredible as a shipper, but also downright terrifying. Clarke let a bomb drop on TonDC so Bellamy wouldn't get discovered, and Bellamy threatened to kill 283 innocent people if Clarke wasn't released from her captives.
Slade Wilson - Arrow
Slade's feelings for Shado, while real, inspired him to do some pretty horrific things. He blamed Oliver for Shado's death and kidnapped the woman he loved in order to inflict the same pain that he felt all those years ago.
Damon Salvatore - The Vampire Diaries
Damon always did sketchy things, but his main reason for being such a villain in the first season was his love for Katherine. He was willing to kill anyone who got in the way of saving her, so it must have been pretty disheartening to discover she wasn't even in trouble in the first place.
William - Westworld
When William was separated from Dolores, he would do anything to see her again. He ended up becoming a murderer in his quest to find her and realized that he enjoyed his new lifestyle.
Leslie Dean - Marvel's Runaways
Leslie ran both the Church of Gibborim and PRIDE and used her position to her advantage. She sacrificed kids for years in order to revive her lover, Jonah.
Angel - Buffy the Vampire Slayer
When Angel fell in love with Buffy, the spell that kept his evil vampire side at bay was broken. In this case, love really was the thing that unleashed evil.