redmo redmond, his on the with fawcett, has been in and out of rehab 12 times. >> there is a very strongic component to addiction. is that what you seep as plaguing your kids? what do you point to? >> i don't point to me. i point to their mother. >> reporter: maybe the mothers are pointing at you? >> i kept a fairly loose house here and they were musicians. the room over here was actually a band room. but that's a loose, maybe too loose way of living. >> reporter: do you feel you failed as a parent? >> sure, of course. i'm a failed parent. >> reporter: one of the more wrenching scenes in farrah's story showed redmond, in chains, coming for a brief trip from jail to visit his mother's death bed. >> people have complained about it, said we were just using him, but no, no. they had a wonderful time together. she died a few months later. >> reporter: having battled leukemia, o'neal now 71 has been diagnosed with mel mona and just this past month, prostate cancer. >> i have a prostate cancer that is contained. >> reporter: you were just diagnosed. what was your reaction? >> why me? >> reporte