'Breaking Bad' trivia and fun facts

Walter was originally written to be 40 years old. AMC felt that 40 was too young for Walter to have a mid-life crisis and requested his age change to 50.

Aaron Paul says the word "bitch" 54 times throughout the series.

The nature of Gus and Max's relationship is never explicitly stated. Giancarlo Esposito stated in an interview that it was a "possibly lover relationship". Vince Gilligan stated in an interview that they "probably were lovers".

RJ Mitte has cerebral palsy in real life. His case is much milder than Walt Junior's. He had to learn to walk with crutches and slow down his speech to play the part.

Vince Gilligan personally selected Baby Blue by Badfinger as the song to be played during the series' final scene, despite numerous objections from his music team. The song was purchased from iTunes over 5,000 times the night of the finale's initial broadcast and re-entered the Billboard charts more than 40 years after it was first released.

When characters on the show are smoking meth, they are actually smoking sugar or rock candy but do not inhale.

Jesse and Walt Jr. are the only regular characters from the first season who never meet each other in the series.

Aaron Paul is a perfectionist. One day, while filming a scene in which a boulder fell to the ground next to White, Paul asked if he could stand on the other side of Bryan Cranston for a scene.

Sony and AMC were initially reluctant to cast Bryan Cranston because of his previous comedic roles. They approached John Cusack and Matthew Broderick for the role of Walter White. When they both declined, Vince Gilligan was able to cast Cranston.

Recent studies show that it is impossible to make crystal meth blue the way Walter White does.