Breaking Bad fans craving to see Bryan Cranston reprise the role of Walter White will likely get their chance.
Breaking Bad creator Vince Gilligan said Cranston and the show's other star, Aaron Paul, are keen to make guest appearances on the feted TV crime-drama's spin-off, Better Call Saul.
"They're both big supporters of Better Call Saul and of all of the actors and crew," Gilligan told AAP in an interview.
"They're all still family, will always be family and I think they're very much open to the idea of appearing on the show."
Breaking Bad, a winner of 16 Emmy Awards during its five season run from 2008 to 2013, was filmed and set in Albuquerque, New Mexico, with Cranston playing White, a high school chemistry teacher dying of cancer who decides to become a methamphetamine producer and seller to set up his family financially.
Paul played Jesse Pinkman, a drug addict and White's sidekick.
Better Call Saul is set six years before the first episode of Breaking Bad.
The spin-off also takes place in Albuquerque and stars another favourite Breaking Bad character, dodgy, strip mall lawyer Saul Goodman, played by comedian Bob Odenkirk.
When Better Call Saul debuted last year it drew the highest ratings for a scripted series in US cable TV history.
The first season followed a then squeaky clean Goodman, who went by his original name Jimmy McGill, while the second season shows his move to the dark side of the law.
Gilligan, if he gets the opportunity, said a lot of care will be taken to insert Cranston and Pinkman into Better Call Saul, comparing it to crafting silver bullets for a werewolf.
"You can only make two or three silver bullets because it costs so much and when you use them on the werewolf you want to aim it correctly," he said.
"I think of Walt and Jesse as our two big silver bullets and I want to shoot them wisely.
"All I can say for sure is it would be a real shame if Better Call Saul had its full run and those guys never showed up.
"That would be a shame for me as among one of the first fans of the show."
Gilligan said Paul's Pinkman would be tricky, because Better Call Saul's timeframe would put the 36-year-old Paul in high school.
Gilligan also said there were plans to hire Cranston to direct an episode of Better Call Saul last season but his schedule was too busy shooting his Oscar-nominated performance in Trumbo and the Lyndon B Johnson HBO TV biopic, All the Way.
Better Call Saul's second season starts tomorrow on Lightbox.