Season four of All in the Family commenced with an object lesson about -- what else? -- racial bigotry. Archie is up in arms over the notion of a Latino family moving into the neighborhood. In this, Archie finds himself with an unexpected ally: Henry Jefferson, his black neighbor from across the street, who is likewise averse to allowing "those people" to make their home on Houser Street. This episode served to introduce the Bunkers' new next-door neighbors, Irene and Frank Lorenzo, played by Betty Garrett (replacing Sada Thompson, who reportedly couldn't get along with series star Carroll O'Connor) and Vincent Gardenia. Written by Don Nicholl, "We're Having a Heat Wave" originally aired on September 15, 1973.