The song that Abby and her son sing as they leave town, "Don't Worry Be Happy," was popularized by Bobby McFerrin and was the first a capella song to reach number in the Billboard Hot 100 chart.
In the closing scene, Jill cuts herself as she realizes her crime is being discovered. The episode ends on her bleeding hand, as Jill is close to literally being "caught red-handed".
Abby marries for the fourth and final time during the run of the series in this episode making her full name: Abigail Fairgate Cunningham Ewing (Scott) Sumner.
While Jill is sitting down writing out wedding invitations, Jill recites aloud her name as "Jillian Louise Bennet" - however, a few years earlier she confessed to Mack that her real name was Dorothy Jill Simpkins.
Val draws on a picture of Jill with ink. Unknown to her, Jill did something similar last season to a picture of Val's (and Gary's) twins.
Jill's voice is heard over the final scene, singing "Mockingbird Hill"
Michael admits to Olivia that he had considered suicide the year before, after Paige had ended their affair.
In her videotaped message to Val, Laura refers to the events of Season 1, Episode 4, "The Lie", in which Val talked Laura into doing the right thing.
This entire episode is improvised by the actors.
Paige refers to Olivia as "a little girl". Well isn't Olivia the same age as Michael and Paige?
Greg says that he hopes the Gavelston line will end with him, making it sound he doesn't have any children. What about Mary Francis?
Gary's car goes out of control while driving, as his car brakes were deliberately sabotaged. This is similar to Sid's brakes being sabotaged in the season 2 finale, even though the two outcomes were different.
Abby tells Gary she could never aim a gun at a person and shoot them. Back in season 2, she did indeed aim a gun at the robbers who held the women hostage in the cul de sac; although she didn't actually shoot anyone.
Karen finally comes face to face with Dr. Ackerman.
After many episodes of eluding, Eric's mystery girlfriend, Whitney, is revealed.
In real life, Ava Gardner had a relationship with Howard Duff, who played Paul Galveston, her character's husband.
In the scene where Val tries to pick up a married man in a bar, she is confronted by the man's angry wife. Val's response to the woman, "I can have your husband any time I want him," is similar to Val & Abby's confrontation over Gary in Episode #52 ("China Dolls") from season three, in which Abby spoke similar words to Val.
Val's alter ego identity of "Verna Ellers" is based on a character from her second novel "National Juncion." Although Val claims the character was based on her mother, Lilliemae claims the character had more similarities with Val. Both Val and Verna share the same initials - VE.
Gary says that he wished him and Val could have kids of their own. Well don't they have a daughter named Lucy on Dallas?
In response to the comment above: Gary's comment referred to the storyline from the 2nd season where he and Val were trying to conceive ANOTHER child.