The characters of Helen, Tom and Jenny Willis as well as Mother Olivia Jefferson were first introduced in the episode "Lionel's Engagement". However, the only actor from the episode to reprise their role in the The Jeffersons (1975) series was Zara Cully (Mother Jefferson). Helen, Tom (named Louis in this one) and Jenny were portrayed by Kim Hamilton, Charles Aidman and Lynne Moody respectively and were replaced by Roxie Roker, Franklin Cover, and Berlinda Tolbert when The Jeffersons (1975) premiered.
This was the first time George Jefferson yelled an "N-bomb" on the show. Archie replies with, "Geez, I ain't used that word in 'tree' years."
Isabel Sanford's reaction meeting Mr. Willis is very similar to her earlier role in "Guess Who's Coming to Dinner" when she (and Katharine Hepburn) met Sidney Poitier's character.
The only time the Willis' were ever seen socializing with the Bunker's.
Tom Willis name was originally Louis Willis.