Breaking Bad: Season 2, Episode 13 - ABQ (2009)

In 'ABQ', Jane Margolis, who is Jesse Pinkman's girlfriend, tragically dies from a heroin overdose. Walter White, who is deeply conflicted about his actions, inadvertently contributes to her death by failing to intervene when she is choking on her own vomit after overdosing.

Walter's decision to let Jane die has profound effects on Jesse. He is devastated by her death, feeling immense guilt and sorrow. This event marks a significant turning point for Jesse, leading him deeper into addiction and despair as he struggles to cope with the loss.

The airplane collision serves as a metaphor for the chaos and consequences of Walter's choices. The crash is a direct result of the emotional fallout from Jane's death, as her father, an air traffic controller, is unable to focus on his job due to his grief, leading to the tragic mid-air collision.

Throughout 'ABQ', Walter grapples with his dual identity as a family man and a drug manufacturer. His internal conflict is highlighted by his cold decision to let Jane die, showcasing his moral decline and the increasing weight of his criminal actions on his conscience.

Donald Margolis, Jane's father, is portrayed as a deeply affected individual who is unaware of the connection between Walter and his daughter's death. His grief and subsequent actions as an air traffic controller are pivotal, as they lead to the catastrophic airplane collision, symbolizing the far-reaching consequences of Walter's choices.