I just think the producers got overly excited about this case because they found both the mother and the father even though they had separated shortly after the birth/adoption. In most cases, the adopted child locates only his birth mother, or the birth mother locates the child they gave up for adoption. Rarely is the father featured in the story, because usually it's someone who either ran out on the mother as soon as he found out she was pregnant or, worse, date-raped the mother. 

In cases where it's simply that the mother and father were high school sweethearts and went their separate ways long ago, I suspect the show does in fact try to reach out to the birth father as well, only to find out they don't want any part of the show or even to meet their child. I bet a lot of these guys moved on and got married and had other families and never told them they fathered a child out of wedlock in high school.  It's probably a lot more typical for the birth mother to feel bonded with a child she gave up than for a birth father. 

I hope this was just a rare exception to the usual formula because I prefer two stories per episode. I didn't feel this story was quite interesting enough to merit a full hour.

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