Season 3, Episode 1 - "Old Friends"
Dorothy goes to the boardwalk to secretly observe her mother after Sophia tells her about a fight she had with her friend, Alvin. While Dorothy is watching them, Alvin's daughter, Sandra, approaches her; she's looking after her father, too. What does Sandra tell Dorothy about Alvin?
He has Alzheimer's. His family is sending him to New York to be cared for by his nephew, who is a doctor.