"Change the equation."
Breaking Bad - Easter Eggs & Hidden Details
Easter Eggs
The titles of four episodes in Season 2 foreshadow the season's climactic plane crash.
The titles are "737," "Down," "Over," and "ABQ." When put together, they spell out "737 Down Over ABQ," explicitly foreshadowing the Wayfarer 515 disaster that happens in the season finale. This is a classic example of the show's meticulous planning and use of subtle clues for attentive viewers.
Vince Gilligan, the show's creator, worked extensively on "The X-Files" and included many actors from that show in "Breaking Bad."
Bryan Cranston, Aaron Paul, Dean Norris, and Bob Odenkirk all had roles in "The X-Files" years before "Breaking Bad." This created a fun connection for fans of both shows and demonstrated Gilligan's loyalty to actors he had worked with previously.
In the final season, Walter White is living in New Hampshire under the surname "Lambert."
This is a subtle nod to his wife Skyler's maiden name. It can be interpreted as a final, ironic connection to the family he has lost and the life he left behind, showing that even in his new identity, he cannot escape his past.