One of the men who interrogated 9/11 mastermind Khalid Sheikh Mohammed was on “The Kelly File” tonight to discuss the controversial report on the CIA’s enhanced interrogation methods.

Dr. James Mitchell joined Megyn Kelly for a four-part interview tonight, and will appear again on "The Kelly File" tomorrow.

Watch tonight's full interview below, and don't miss more from Mitchell tomorrow at 9p ET.

'Pressure to Head Off a Second Wave'

Mitchell explained how he was asked to figure out detainee resistance behaviors.

“There was so much pressure about trying to head off this second wave [of attacks] that was coming, that they were going to use some kind of physical coercion," he said.

Watch part one above to hear more about enhanced interrogation methods.

Interrogating Khalid Sheikh Mohammed

Mitchell described Sheikh Mohammed in initial interrogations as “immensely arrogant” and “disdainful.”

“He had a propensity at that particular point to be confrontational without being physical,” Mitchell said.

Mitchell touched on waterboarding, telling Kelly, “Those techniques are so harsh that it’s emotionally distressing to the people who are administering them. Even though you don’t want to do it, you’re doing it in order to save lives in the country, and we would just have to man up for lack of a better term.”

Mitchell recalled how he initially did not want to do interrogations, and he remembered the instant that he decided to “pony up.”

“The 911 victims are the reason that I’m here,” he said.

'Al Qaeda Tried to Decapitate the U.S.'

Mitchell remembered the heroes on Flight 93, telling Kelly that if ordinary people were willing to give up their lives to save the Capitol building, then he should be able to give up his moral high ground to save more lives.

“What we forget is al Qaeda tried to decapitate the United States on 9/11,” Mitchell said.

Mitchell recalled how waterboarding was not effective against Sheikh Mohammed, and he told Kelly that other enhanced interrogation techniques finally led the terrorist to divulge useful information.

He cautioned that Americans shouldn’t trust Senate Democrats who Mitchell claimed went in with an agenda on this report. Instead, they should trust the men and women of the CIA who wrote reports which were released back when ex- Vice President Dick Cheney requested them.

'This Shows ISIS We're Easy Targets'

Mitchell told Kelly that this ordeal “is like being caught in a bad spy novel.”

He said that those who released the CIA report knew the results they wanted beforehand.

“They didn’t give us a chance to explain anything,” he said.

Now, Mitchell said that interrogators are getting death threats, and he fears for his life.

“I do not mind giving my life for my country, but I do mind giving my life for a food fight for political reasons between two groups of people who should be able to work it out like adults.”

Mitchell alleged that no one from the Senate committee has ever asked him a single thing about the interrogations.

“Khalid Sheikh Mohammed has the opportunity to address the charges against him, but I don’t,” he said.

Mitchell told Kelly that he feels horrible because this report puts Americans at risk.

“It shows al Qaeda and the al Qaeda 2.0 folks, ISIL, that we’re divided and that we’re easy targets, that we don’t have the will to defeat them because that’s what they know. In fact, Khalid Sheikh Mohammed told me personally, ‘Your country will turn on you, the liberal media will turn on you, the people will grow tired of this, they will turn on you, and when they do, you are going to be abandoned.'”