Stephen Collins says he's not attracted to children but rather had "a distortion" in his thinking and needed attention when he engaged in sexual misconduct with three girls decades ago.
In a video interview with Yahoo Global News Anchor
"I think I am someone who caved in several times to exhibitionist urges. Someone who had real big boundary issues as a young man and beyond that to an extent," he said.
He told Couric he spoke to a therapist, who explained to him that if he were attracted to children he would have acted out more frequently.
The 67-year-old said he was "deeply remorseful about what happened" and had not "had an impulse to act out in any such way" since the third incident.
"With all my heart, I want them to know how sorry I am and that I haven't engaged in any such behavior for over 20 years," he said in the statement. "I deeply regret the mistakes I've made and any pain I caused these three women."
In 2012, detectives in New York and Los Angeles began investigating Collins following allegations that he had sexually abused underage girls.
The investigations were made public earlier this year, after an audio recording surfaced in which a man purported to be Collins confessed to sexually abusing three girls.
The interview is airing on ABC's "20/20" on Friday.
Staff writer Kate Mather contributed to this report.