2. Telling Jesse He Watched Jane Die
The most diabolical thing Heisenberg did in the episode 'To'hajiilee', however, was telling Jesse that he watched Jane die just before Jesse was marched away by the Nazi's to face an almost certain death. The look of sheer devastation on Jesse's face as these words came out was heartbreaking, and an example of Heisenberg's sheer lack of compassion at A) doing nothing to save Jane and B) causing the deaths of hundreds of airline passengers. This revelation was cold and calculated and showed that any soul Walt may have had soon vanished when he became Heisenberg.