Thalmus Rasulala's last appearance on the show, specifically as Raj's and Dee's father, Bill Thomas. Also, despite the conversation between Dee and Lee (Lenora), this is Lee Chamberlin's first and last appearance on the show.
During the second season, Mabel King began offering advice to the producers about her character and story lines. One of her suggestions was that Bill and Mama get remarried so the show could project a "strong black family." The producers did not appreciate her unsolicited advice which caused major tension on set. They resolved the issue by significantly reducing King's workload in the second season. King's contract was not renewed for the third season. The story line said that Mama moved to Arizona to care for a sick friend . This would have been totally out of character for her to leave her kids behind. The producers later said they were wrong not to consider King's advice.
Rerun appears in the exact same outfit the entire show despite the story line happening over several days. He is the only guest at the wedding who did not dress up for the occasion. Fred Barry had recently returned to the show after staging a walkout over his dressing room and salary. Perhaps his lack of costume choices was the producers' way of punishing him for his behavior.