The Jeffersons is the longest running African American sitcom to date, followed by Family Matters(9 seasons) and The Cosby Show(8 Seasons).
The Jeffersons outlasted its parent series All in the Family (with 9 seasons) by 2 seasons. The Jeffersons also stayed on 6 years after All in the Family ended its run.
Factual error: when Bentley is explaining to Jessica about helium, he mentions that oxygen is number 6 on the periodic table of elements. Oxygen is actually number 8, whereas number 6 is carbon.
When Louise first meets Sammy Davis Jr.in the hallway, he calls her Mrs. Jefferson, but she hasn't told him her name.
Louise has already met Sammy Davis, Jr. on All in the Family. This is never mentioned.
This episode states that George's flashback with his father takes place in the early 1941. However, in the season 6 episode "Where's Papa?", his father is mentioned to have died in 1939.
The Jeffersons opened their first store during the first season of All in the Family, which was in 1971, not 1968.
When Gladys Knight comes into the apartment and start talking to Florence, if you look closely you will see someone off stage moving the curtain.
When George enters the clubhouse, he makes sure to latch the chain behind him. Later in the scene, when the rest of the Strays enter, they open the door with no problem, and you can see behind them that the chain is not broken.
Notice the scene with George, Florence and the bell: Marla Gibbs will re-enact the same "hammering the bell" scene four years later on her own series, 227.
Louise told Mrs. Whittendale that she and George never had a dog. However, in the "All In The Family" episode 'Gloria the Victim", Lionel told Archie that their dog, Wilma, ate the foot-long hot dogs Edith brought over to defrost.
The reason for Mr. Bentley's being in Russia is due to Bentley having an affair with an Ambassador's wife. The Ambassador had Bentley transferred to Russia in retaliation.
This same storyline with the diary is later used on an episode of Family Matters.
When George is leaving the Bradley building to meet who could be his father-in-law, he is seen putting the picture of Louise and her father back into the photo album. Later, when George hands Louise his checkbook, she finds the same picture there. It is never explained how the picture of Louise and her father got from the photo album to George's checkbook.
When Florence joins the Jefferson's in the kitchen to ask for the money, George is placing lettuce on his sandwich bread. After Florence tries to make nice the camera cuts back to Mr. Jefferson and the lettuce is lying on the plate.
After Weezie and George make up she sees a stripper that interests her, George then pulls Weezie from the club and forgets his coat that is laying over the chair.
In this episode we learn that George originally wanted to name his cleaning business Handy Dandy Cleaners and that it was Louise who suggested the name Jefferson Cleaners.
George Jefferson may be celebrating his 50th birthday, but actor Sherman Hemsley just turned 42 when this episode aired. In comparison, Isabel Sanford (Louise Jefferson) was actually 62 years old when this episode aired.
George mentions in this episode he was nine years old when his father died. However, in the season 4 episode "The Camp-Out" George tells Marcus that his father died when he was ten years old.
The long dance scene at the discotheque features the song "Instant Replay" by Dan Hartman, which reached #1 on the Dance Charts in 1978.