While the most beloved supporting character on Breaking Bad was probably Saul Goodman (Bob Odenkirk) himself — hence him getting a spinoff — easily the supporting character Breaking Bad fans most loved to hate was drug kingpin Gus Fring (Giancarlo Esposito).
What exactly drove Gus to become the merciless murderer he was by the time he met Walt and Jesse?
This was a fact Walt came to know quite well, once he succeeded in getting on Gus’ bad side.
Gus pops in right at the end, at the helm of his Los Pollos Hermanos front business, complete with smile that’s just a bit too artificially cheerful.