The Bag's In The River - [s1e3] ...and

: This is widely considered the episode where Walt crosses the point of no return. While his first kill (Emilio) was accidental/self-defense in the moment, killing Krazy-8 is his first act of premeditated murder .

: Walt decides to let Krazy-8 go, but while retrieving the key, he pieces together a broken plate in the trash and realizes one large triangular shard is missing. [S1E3] ...And the Bag's in the River

: While feeding Krazy-8, Walt suffers a coughing fit and collapses. Upon waking, they share a beer and a surprisingly human conversation about Krazy-8's father’s furniture store, Tampico Furniture . Walt even confesses his cancer diagnosis to him. : This is widely considered the episode where

: This episode features the first chronologically occurring scene in the series (the flashback to 1985–1989) and the first mention of Marie's shoplifting habit. : While feeding Krazy-8, Walt suffers a coughing