With Breaking Bad set to close its final season, we're taking a look back at Walter White's greatest technological and scientific feats that allowed him to take Albuquerque and the drug trade by the throat—and then slowly squeeze.

From the very first episode, Walt established himself as a force of intelligence, and as each episode passed, and the risks and challenges got greater, he evolved into something unrecognizable in comparison to his former self. Here are the top tech moments in Breaking Bad, from Walter to Heisenberg, that led to the deterioration of his past, and his rise to power. 

A word of warning: spoilers galore ahead.