S4·E1 New Orleans (1)

Nell and Joey go to New Orleans where Nells sees a man she hant seen in 15 years. The two take Joey to the World's Fair, and when they go to visit a jazz club, he proposes to her. She is baffled by his proposal and doesn't know what to say. As this is happening, a man is watching Joey in the jazz club. When Joey finally sees him looking at him, he goes to Nell and tells him he thinks that the man is his father. The man happily says ""Joey"" as Joey says ""Dad"", and the two embrace, as Nell stares in shock.