Julio and Sister and Nephew

Julio and Sister and Nephew was the 72nd overall episode of Sanford and Son. Also the 10th episode of Season Four, it first aired November 15, 1974.

Episode synopsis
Allergic to Chico the goat, Julio's sister Carlotta Fuentes (Miriam Colon) and young nephew Roberto (Manuel Carrasco) stay with the Sanfords. Controversy arises when young Roberto is placed down a grade in school because of his poor English skills. Suddenly, foul-mouthed Fred, who is able to persuade the school's principal Graham Brown to serve as Roberto's tutor, becomes the world's staunchest advocate of equal rights for all.