Fly

Lore & Background

Walt, suffering from insomnia, works a batch with Jesse and calculates that their yield falls short of what he expects; Jesse, who has secretly been skimming small amounts, blames spillage. After Jesse leaves, Walt spots a housefly in the lab and fears it will contaminate the cook. He tries everything to swat it, falls from the catwalk, and when Jesse returns insists that they cannot start again until the fly is gone.