Plot summary
Angela and the gang are cleaning out the attic. Angela accidentally throws out some old Yoo-Hoo bottle caps, thinking they were garbage. But to Tony, they are a cherised memento of his late grandfather. Tony explains that he really didn't like his grandfather at first when he came to help his dad soon after his mother had died, but when he taught Tony how to tap dance with those bottle caps, he began to have a better relationship with him. Tony also relates a few years later that because he had gotten into trouble with the police for stealing a street sign, his grandfather had to miss his U.S. citizen swearing-in ceremony and died before he could attend the next one.
Now Tony wants to do something special for his grandfather, so he goes and sees a judge, asking him if he could posthumously swear in his grandfather, with Tony taking his place. The judge agrees, and Tony's grandfather finally becomes a U.S. citizen.
Credits
Adapted from Wikipedia contributors, List of Who's the Boss? episodes. HTML formatting and reference markers removed.