Question: "Breaking Bad" creator Vince Gilligan cast Bryan Cranston for the role of Walter White based on having worked with him in an episode of what previous television series?
About the article "Breaking Bad", section "Casting".

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"Breaking Bad" creator Vince Gilligan cast Bryan Cranston for the role of Walter White based on having worked with him in an episode of the science fiction television series "The X-Files", on which Gilligan worked as a writer.
Cranston played an anti-Semite with a terminal illness who took series co-protagonist Fox Mulder (David Duchovny) hostage.
Gilligan said the character had to be simultaneously loathsome and sympathetic, and that "Bryan alone was the only actor who could do that, who could pull off that trick.
And it is a trick.
I have no idea how he does it."
AMC officials, who were initially reluctant with the casting choice, having known Cranston only as the over-the-top character Hal on the comedy series "Malcolm in the Middle", approached actors John Cusack and Matthew Broderick about the role.
When both actors declined, the executives were persuaded to cast Cranston after seeing his "X-Files" episode.
Cranston contributed a great deal to the Walter White persona.
When Gilligan left much of Walter's past unexplained during the development of the series, the actor wrote his own backstory for the character.
At the start of the show, Cranston gained 10 pounds to reflect the character's personal decline and had the natural red highlights of his hair dyed a regular brown.
He collaborated with costume designer Kathleen Detoro on a wardrobe of mostly neutral green and brown colors to make the character bland and unremarkable, and worked with makeup artist Frieda Valenzuela to create a mustache he described as "impotent" and like a "dead caterpillar".
Cranston repeatedly identified elements within certain scripts where he disagreed with how the character was handled, and went so far as to call Gilligan directly when he could not work out disagreements with the episode's screenwriters.
Cranston has said he was inspired partially by his elderly father for how Walter carries himself physically, which he described as "a little hunched over, never erect, if the weight of the world is on this man's shoulders".
In contrast to his character, Cranston has been described as extremely playful on set, with Aaron Paul describing him as "a kid trapped in a man's body".
Gilligan originally intended for Aaron Paul's character, Jesse Pinkman, to be killed at the end of "Breaking Bad" 's first season in a botched drug deal as a plot device to plague Walter White with guilt.
However, Gilligan said by the second episode of the season, he was so impressed with Paul's performance that "it became pretty clear early on that would be a huge, colossal mistake, to kill off Jesse".
Walter Hartwell White (also known by his clandestine alias Heisenberg) is a fictional character in the American television drama series "Breaking Bad" on AMC.
He was created by series creator Vince Gilligan and is portrayed by Bryan Cranston.
Walter was once a promising chemist and among the founders of the multi-billion dollar company Gray Matter Technologies, but he soon left, selling his shares for $5,000 for personal reasons and becoming an unhappy and disillusioned high school chemistry teacher.
After being diagnosed with Stage IIIA lung cancer, he resorts to manufacturing methamphetamine to ensure his family's financial security after his death.
As the series progresses, Walter gradually becomes darker and more villainous.
Although AMC officials hesitated to cast Cranston due to his previous comedic role on "Malcolm in the Middle", Gilligan cast him based on the actor's past performance in the "X-Files" episode "Drive", which Gilligan wrote.
Cranston contributed much of his character, including Walter's back story, physical appearance, and personality traits.
Gilligan has described his goal with Walter White as turning Mr. Chips into Scarface, and deliberately made the character less sympathetic over the course of the series.
Both the Walter White character and Bryan Cranston's performance have received critical acclaim.
Cranston won three consecutive Primetime Emmy Awards for Outstanding Lead Actor in a Drama Series, becoming the second actor to do so since Bill Cosby for "I Spy" in the 1960s.
In the Spanish-language remake "Metástasis", his character is renamed Walter Blanco and is portrayed by . 
"Breaking Bad" creator Vince Gilligan cast Bryan Cranston for the role of Walter White based on having worked with him in a sixth season episode of the science fiction television series "The X-Files", where Gilligan worked as a writer.
Cranston played an anti-Semite with a terminal illness who took Fox Mulder (David Duchovny) hostage.
Gilligan said the character had to be simultaneously loathsome and sympathetic, and that "Bryan alone was the only actor who could do that, who could pull off that trick.
And it is a trick.
I have no idea how he does it."
AMC officials were initially reluctant with the casting choice, having known Cranston only as the over-the-top character Hal on the comedy series "Malcolm in the Middle" and approached actors John Cusack and Matthew Broderick about the role.
When both actors declined, the executives were persuaded to cast Cranston after seeing his "X-Files" episode.
Cranston contributed a great deal to the character's persona.
When Gilligan left much of Walter's past unexplained during the development of the series, the actor wrote his own back story for the character.
At the start of the show, Cranston gained 10 pounds to reflect the character's personal decline.
He had the natural red highlights of his hair dyed a regular brown.
He collaborated with costume designer Kathleen Detoro on a wardrobe of mostly neutral green and brown colors to make the character bland and unremarkable, and worked with makeup artist Frieda Valenzuela to create a mustache he described as "impotent" and like a "dead caterpillar".
Cranston has also repeatedly identified elements in scripts where he disagreed with how the character was handled, and has gone so far as to call Gilligan directly when he could not work out disagreements with the episode screenwriters.
Cranston has said he was inspired partially by his elderly father for how Walter carries himself physically, which he described as "a little hunched over, never erect, if the weight of the world is on this man's shoulders".
In contrast to his character, Cranston has been described as extremely playful on set, with Aaron Paul describing him as "a kid trapped in a man's body".
Gilligan has said it has been difficult to write for Walter White because the character is so dark and morally questionable: "I'm going to miss the show when it's over, but on some level, it'll be a relief to not have Walt in my head anymore."
As the series has progressed, Gilligan and the writing staff of "Breaking Bad" have made Walter more and more unsympathetic.
Gilligan said: "He's going from being a protagonist to an antagonist.
We want to make people question who they're pulling for, and why."
Cranston said by the fourth season: "I think Walt's figured out it's better to be a pursuer than the pursued.
He's well on his way to badass."
Regarding White's fate in the series ending, Cranston foresaw it as "ugly[, with no] redemption," although earlier, Gilligan divulged his plans to "end on a high note, in a way that will satisfy everyone."
"Breaking Bad" was created by television writer Vince Gilligan, with the crux of the series being the protagonist's journey into an antagonist.
He stated "Television is historically good at keeping its characters in a self-imposed stasis so that shows can go on for years or even decades," he said.
"When I realized this, the logical next step was to think, how can I do a show in which the fundamental drive is toward change?"
He added that his goal with Walter White is to turn him from Mr. Chips into Scarface.
The concept of Walt as a meth dealer came to fruition when Gilligan was talking with fellow writer Thomas Schnauz, and they joked regarding their unemployment that the solution was "putting a meth lab in the back of an RV and driving around the country cooking meth and making money."
The script was originally set in Riverside, California, but at the suggestion of Sony, Albuquerque was chosen for production due to the favorable financial conditions offered by the state of New Mexico, and the setting was moved there too because otherwise "we'd always have to be avoiding the Sandia Mountains" in shots toward the East, according to Gilligan.
Gilligan cast Bryan Cranston for the role of Walter White based on having worked with him in a sixth season episode of the science fiction television series "The X-Files", where Gilligan worked as a writer.
Cranston played an anti-Semite with a terminal illness who took series co-protagonist Fox Mulder (David Duchovny) hostage.
Gilligan said the character had to be simultaneously loathsome and sympathetic, and that "Bryan alone was the only actor who could do that, who could pull off that trick.
And it is a trick.
I have no idea how he does it."
AMC officials were wary of casting Cranston, due to his being mostly known his comedic role as Hal on the series "Malcolm in the Middle".
The executives offered the role to John Cusack and Matthew Broderick who both turned it down.
After seeing Cranston in the "X-Files" episode, the executives were convinced to cast him.
Cranston gained ten pounds for the pilot to reflect the character's personal decline, and had his hair dyed brown to mask his natural red highlights.
Cranston collaborated with costume designer Kathleen Detoro and makeup artist Frieda Valenzuela to make the character of Walt both bland and unremarkable and impotent. 
Dave Porter is an American composer who wrote the opening theme, as well as the original score for the television series "Breaking Bad".
At Sarah Lawrence College, Porter studied classical and electronic music composition.
For his work on "Breaking Bad", Porter has won an ASCAP Award.
Bryan Cranston, who portrays Walter White, stated "With his music, Dave Porter has created another character for Breaking Bad.
Evocative and meaningful, Dave's work is an essential part of the storytelling."
Porter stated that influences on the series' music came from discussions with Vince Gilligan, the creator of "Breaking Bad", about the show having aspects of a post-modern western.
For the final episodes of the series, Porter incorporated four important themes that were in previous seasons.
Porter has a wife, Jeanine, and a son.