Before he was President Trump’s tormenter, Robert Mueller had three nice, long chats with Colorado TV talker Aaron Harber.

The former FBI director is in the national spotlight again as the special prosecutor investigating whether President Trump or his allies colluded with Russia to rig the 2016 presidential race.

This weekend Harber is begins a series of specials from his interviews with the now more-circumspect investigator.

“We decided to create this series because Mueller is referenced in the news daily by a number of parties but he does not personally respond to statements made about him,” the show says on its website. “Because most Americans have not had the opportunity to see him in an unrehearsed setting, as a public service, we have created this opportunity for citizens to hear Mueller firsthand discussing his career prior to serving as DOJ Special Counsel and make their own evaluations of him.”

Besides having him in studio for interviews, Harber talked to Mueller in 2015 on stage in Denver before an audience of high school students, law enforcement members and others at an event put on by KCDO-TV Channel 3 K3 Colorado.

Parts 1 and 2 of the four-part series air Sunday at 11 a.m. and 8 p.m. on KCDO Channel 3. Parts 3 and 4 will air on July 22 at the same times.

Former U.S. Sen. Ken Salazar, a Democrat and Colorado’s former attorney general, was in private law practice with Mueller at WilmerHale.

“For those of you in public life in public service, there’s a lot to that,” Salazar says before yielding the floor to the discussion between Mueller and Harber, “because there’s other opportunities, yet you do it because you want to make the world a little better place.”

Harber asked Mueller about the U.S.’s apparent success stopping terrorists since 9/11. Mueller pointed out that the country hasn’t always been successful, pointing to mass shootings and the Boston Marathon bombing in 2013.

“You spend a lot of time with the victims and their families,” he said. “So it sears you when you don’t stop an attack.”

Mueller spoke of his behind-the-scenes insights from in the aftermath of 9/11 and the Boston bombings. But he said progress and been made by the FBI.

“The key to this was the partnerships, the partnerships with the CIA and the partnerships, more than anything else, with state and local law enforcement.”

Mueller spoke about the balance between privacy and national security, when it comes to phone surveillance. He pointed to the Foreign Intelligence Surveillance Court, the special court that reviews requests for surveillance.

“That is a pretty good guardian our privacy given the threats we have, both domestic and overseas,” Mueller told Harber.