(CNN) -- Ariel Castro used the promise of a puppy to lure Michelle Knight into the Cleveland home where he held her hostage for 11 years.
"He tells me, 'Just come in for a little while. The puppies are upstairs. You can take one home to your son,'" Knight said in an interview broadcast Tuesday on the syndicated "Dr. Phil" talk show.
But she soon realized there were no puppies inside Castro's home. And it wasn't long, Knight said, before he trapped her in an upstairs room and tied her up with an extension cord. From there, he took her down into the basement about 24 hours later, she said.
It was the beginning of more than a decade of torture, rape, starvation and beatings for Knight. The hope of seeing her son again, she said, inspired her fight to survive.
"I want my son to know me as a victor, not a victim," Knight told host Dr. Phil McGraw. "And I wanted him to know that I survived, loving him. His love got me through."
Castro lured Knight into his vehicle from a Family Dollar store in Cleveland in 2002, promising to give her a ride. She was the first of three women he would capture and imprison in his home for about a decade. They were freed in May after one of the women, Amanda Berry, called out to neighbors for help.
Knight, Berry and the third woman, Gina DeJesus, have since been trying to readjust to life as free women. Knight, whose disappearance generated the least public notice of the three, has been the most outspoken.
"After 11 years, I am finally being heard, and it's liberating," she said in a powerful statement at Castro's sentencing, describing the abuse she endured.
Her interview with "Dr. Phil," which began airing Tuesday and is set to continue Wednesday, provides a detailed glimpse into some of the horrors she suffered and her struggle to survive.
"How she continued to put one foot in front of the other during these 11 years is just very humbling. I mean, I said to her during the interview, 'Michelle, I will never complain about another thing the rest of my life,'" McGraw told CNN's AC 360. "When you realize what she went through, it makes everything else seem so trivial."
'It's God's will if you die'
Knight said she remembered the warning, the one Castro delivered while wrapping a chain around her neck and shackling her to a metal pole in the basement of his Cleveland home.
"Now, if I do it too tight and you don't make it, that means you wasn't meant to stay here. That means God wanted to take you," Castro said, according to Knight.
Knight told McGraw she sometimes spent days in the basement, chained to the pole, unable to lie down and with a motorcycle helmet over her head. The helmet made it hard to breathe, she said, "and later on I didn't remember a thing 'cause I had passed out."
A photograph of the pole showed white paint had been scraped away.
"That's where I tried to get out," Knight said. "And I couldn't pull the pole down because I wasn't strong enough."
Knight told McGraw that she didn't always fight back, though, at least not at first.
She said she was in shock after being taken and all she could do was cry and beg him to let her go back to her son.
Several attempts to escape were met with harsh punishment, she said.
"He took a pipe and he held it ... over my head, and he said, 'If you scream, I'll ram this down your throat and I'll kill you,'" Knight recalled, describing what she said was Castro's response after she used a pair of pliers and a wire cutter to remove a chain around her neck. "So I didn't scream. I didn't make a noise. I just laid there."
Knight, 32, was 21 years old when she was reported missing in 2002.
Castro, she said, would tell her of his plans to abduct other women and also implied he'd done it before.
She said he showed her an area in the basement where it said, "Rest in Peace."
"I begged him not to bring any more there to suffer the hell I went through," Knight said.
But it wasn't long before Knight learned that she wasn't the only captive.
In 2003, Berry joined her inside the house. At first, she said, they rarely saw each other.
"When we did, it was like a quick hug and 'bye,' because he wouldn't let us stay in the same room for that long," she said.
When they were in separate rooms, Knight said, she would blare her television if she saw Berry's mother on air, to make sure Berry knew to watch. And when she saw Berry, Knight said, she tried to comfort her.
"Sometimes she would cry, and I'd tell her everything would be OK, and that one day we'll get home," Knight told McGraw. "We just have to, you know, wait it out."
Castro's main 'punching bag'
Since their release, accounts have depicted Knight as someone who cared for the other victims during their captivity while also enduring great suffering herself.
A family friend of one of the victims said this year that Castro used Knight as his main "punching bag."
The friend said Castro hit Knight with a variety of objects, including hand weights. She has suffered vision loss, joint and muscle damage, and other problems from her time in captivity.
According to an initial incident report obtained by CNN, Knight said she became pregnant at least five times while in Castro's home.
In the interview with McGraw, Knight said she once watched Castro kill a beloved dog by breaking its neck. She said she was kept nearly naked in a frigid room with windows boarded up. And she said Castro once punched her in the stomach with a barbell when he learned she was pregnant.
"I fell to the floor. ... He said, 'Tomorrow it'd better be gone. That's all he said,'" Knight recalled. "Then when I did miscarry, he blamed me. He said that I hated him, that I killed his kid, and he punched me in the face, saying that it was all my fault."
A troubled past
During Knight's time in captivity, her case got less media attention than the disappearances of Berry and DeJesus, whose family members posted fliers and held candlelight vigils for them.
Knight's grandmother, Deborah Knight, told The Plain Dealer in May that the family had concluded that Michelle had left of her own accord because she was angry that she had lost custody of her then-2-year-old son. That conclusion was supported by police and social workers, she told the newspaper.
Knight told McGraw that her son was taken away after her mother's boyfriend abused him.
"And then they tried to say that I never protected him, and I did," she said. "I did all I could do."
She was still trying to do all she could on the day when she was abducted in 2002, Knight said. She told McGraw she got lost on the way to a meeting with social services to discuss her son's custody. That's when she stopped at the dollar store to ask for directions, she said, and when Castro offered her a ride.
In the interview, Knight also gave a glimpse into what she described as a troubled childhood before her abduction, which she said was why she didn't want to see her mother after she was released.
"I wished my mother wasn't my mother. ... I wasn't allowed out. I wasn't allowed to have friends. She made sure I was dumber than a doorknob," she said.
In response, her mother, Barbara Knight, issued a statement to the "Dr. Phil" show.
"Michelle, my daughter, has been the victim of long-term and profound and unspeakable torture. Her point of view has been altered by that monster and what he did to her," the statement said. "What I have heard that she said about me breaks my heart. That is because what she now believes, while not true, increases her pain. I love my daughter. I always have and always will. I pray that someday she will heal enough to know that again."
CNN's Martin Savidge, Pamela Brown and Chelsea J. Carter contributed to this report.