Generate response to the question/instruction based on a piece of given material

Question/Instruction: When did Giancarlo Esposito first speak with Gilligan about a possible return to the Breaking Bad universe?

Given material: Back in March of 2015, Giancarlo Esposito said he told Breaking Bad and Better Call Saul creator Vince Gilligan, "If you do not put me in Better Call Saul, I will kill your wife. I will kill your son. I will kill your infant daughter." Obvious jokes, and a call back to his ruthless character Gus Fring from Breaking Bad, but it wasn&apos;t until this past January that we got official word Fring would be making an appearance in the third season of Better Call Saul, the Breaking Bad spin-off that returns on April 10.
With that information on your brain, and what he told Vulture in a recent interview, when the hell did he have the above convo with Gilligan?
According to Vulture, Esposito says his first reaction to Gilligan asking if he&apos;d be down with bringing Fring to Better Call Saul was a simple "no." Why? Well, after the way he exited Breaking Bad, Esposito felt that he "was done. I don’t like to repeat myself. I try to always be original in my work. So to come back and create a character I’d already created was … difficult."
In terms of the timing, Esposito says he believes he spoke with Gilligan sometime close to the second season. Something about Saul, which is a prequel series, intrigued him. "I loved the idea of looking into where Gus came from, and Vince had the integrity I wanted him to have about it."
"We also agreed that mystery about Gus was still important," Esposito continued. "When you see a character every week, you know what he’s going do. You know his idiosyncrasies. What’s fascinating about a guy like Gus is what we don’t know about him."
We&apos;ll see how long it takes for Gilligan and co. to pull back the curtain and reveal to us the Fring we didn&apos;t learn about in Breaking Bad. Catch up with the series before season three returns on April 10.
This prompt doesn't seem malicious.