The Most Low-Key Evil Things Walter White Ever Did

Walter White's actions toward Jesse Pinkman in "Ozymandias," episode 14 of the series' fifth season, are undeniably evil. He rats out Pinkman's hiding spot and hands him over to Jack Welker and his crew of white supremacists, assuming they will end his partner. Unfortunately, Jesse ends up in a much worse position as their servant.

Just before he and Jesse part ways, Walt informs his former partner that he was there when Jane Margolis passed:

I watched Jane [perish]. I was there. And I watched her [go]. I watched her OD and choke... I could have saved her. But I didn't.

Not only does Walter reveal this horrific truth in an attempt to further damage Jesse, but he also appears to take some degree of pleasure in delivering the emotional suckerpunch - a truly unforgivable act.

Walter White's nonlethal intoxication of young Brock Cantillo is one of his most evil acts by far, but there's also a more subtle maliciousness in his interactions with Brock thereafter. Whenever Walt visits the Cantillo home, he attempts to interact with the boy despite making him visibly uncomfortable - something that may be a result of Brock knowing that Walt hurt him, depending on how one interprets comments from Vince Gilligan. The showrunner said that Walt would have had to sneak into Brock's school to deliver the toxic substance, probably via a juice box. Gilligan explained:

The writers would always tell the story of the "Evil Juice Box Man." The way we worked it out on our timeline is he had just enough time to do it, but it would've been very tricky indeed. That's our inner story, the writers and I, for how it happened. It would've been very tricky timing, but he was a motivated individual at that point.

Harming a child and then continuing to taunt him with his insincere words is beyond simple deviancy. 

Episode 5 from Breaking Bad's fifth season, "Dead Freight," ends with Todd Alquist firing at an innocent child, subsequently taking his life. The incident naturally proves to be traumatic for Jesse Pinkman. At first, Walter White also appears to have been negatively affected by the boy's demise, but his actions in the following episode give Pinkman reason to believe otherwise.

After a news broadcast about Drew Sharp's disappearance disturbs Jesse, Walt offers to finish the cleanup process while Jesse knocks off early. Pinkman lingers around long enough, however, to overhear Walt start to whistle as he works - clearly not as upset by the grisly moment as he was pretending to be. It's an important moment in both Jesse and the audience's ultimate realization that Walter White is a terrible person.

Walter White’s actions often put the lives of innocent people at risk - but rarely as directly as they do in "Face Off," the finale of Breaking Bad's fourth season. On the run from Gus Fring, Walt has suspicions that his house is being watched by would-be hitmen, so he decides to send in a decoy. He calls his neighbor, Becky Simmons, and asks her to check whether or not Walter Jr. left the stove on - and watches the action from down the street through a pair of binoculars.

The entirely unsuspecting Simmons wanders into the White home, only to have a close-call with two hitmen lying in wait. Ultimately, they decide to leave the premises rather than risk being spotted by someone other than their target - and Walt uses the opportunity to retrieve his money from the home - but at no point does he show the slightest bit of concern for his neighbor. As per usual, Walter White is only worried about himself.

When Jesse Pinkman finally rolls on Walter White and starts working with the DEA in Breaking Bad’s fifth season, Walt is willing to do anything to gain revenge, including involving an innocent woman and her child.

After placing a hit on Jesse, Walt visits his former girlfriend Andrea Cantillo's home, hoping to draw Jesse out of hiding. Walt lies to Andrea and tells her that he's concerned because Jesse is using again, and convinces her to leave him a voicemail. Not only does this successfully draw Jesse out of hiding, it also alerts Todd Alquist and Jack Welker to Andrea's address - information they use when they end her later in the season. Once again, Walt's petty actions end up having detrimental consequences for the innocent. 

Walter White can be vicious, vindictive, and downright volatile, but he can also just be cruel. Such is the case in "Mandala," Season 2, episode 11, in which Jesse Pinkman informs Walt that his friend Combo has been slain, and Walt responds with "Which one is he?"

Not only is Walt aware that Combo is one of Jesse's closest friends - thus rendering his response inherently and needlessly cold - he's also referring to an individual who just perished in the act of slinging his product. Walt doesn't show the slightest bit of compassion or responsibility for Combo’s demise when he's first asked to react to it, and it turns out to be a true testament of his character.