Punky Brewster (1984)

Season 2: Episode 9

Punky is feeling a little down after Mike has assigned the class to each work on their family tree. It's making her want her mother Susan back in her life, and when she has a talk with Mike, Mike tells Punky something surprising -- Mike was born on November 23, 1955, and his mother gave him up for adoption when he was just a few days old, and he was never adopted, so he grew up in Fenster Hall. This inspires Punky and Mike to help each other search for their mothers. Only the search for Mike's mother, Lois Collins, is successful, and the fact that Mike has been happily united with Lois delights Punky, who is thankful that Henry found her and took her in after her mother Susan abandoned her a year ago.