1. Chuck Cunningham – Happy Days

Chuck Cunningham, portrayed by Gavan O’Herlihy and later Randolph Roberts, was the older brother of Richie and Joanie on Happy Days. He appeared sporadically in the first two seasons, often playing basketball or eating large meals. However, after the second season, Chuck was abruptly written out without any explanation. The show’s creators never addressed his absence, leading to the term “Chuck Cunningham Syndrome,” which refers to characters who disappear from a series without any in-universe reason.
The lack of acknowledgment for Chuck’s disappearance was notable. In later episodes, the Cunningham parents referred to having only two children, Richie and Joanie, as if Chuck had never existed. This omission was never corrected, and Chuck’s absence was never explained or addressed within the show’s narrative. Fans and critics alike were left puzzled by the unexplained departure of a character who had been part of the family dynamic in the early seasons.
2. Judy Winslow – Family Matters

Judy Winslow, the youngest daughter of Carl and Harriette Winslow, was a regular character on Family Matters during its first four seasons. As the show shifted focus to Steve Urkel’s antics, Judy’s role diminished, and she eventually disappeared from the series without explanation. Her last appearance was in the episode “Mama’s Wedding,” after which she was never seen or mentioned again.
The most perplexing aspect of Judy’s departure was how the show handled it. In later episodes, the Winslows referred to having only two children, Eddie and Laura, completely erasing Judy from the family. This sudden and unexplained disappearance left fans confused and searching for answers that the show never provided.
3. Seven – Married… with Children

Seven, portrayed by Shane Sweet, was introduced as a new addition to the Bundy family in the later seasons of Married… with Children. He was the son of Peg’s sister and moved in with the Bundys, bringing a fresh dynamic to the household. However, after a few episodes, Seven was written out of the show without any explanation, and his absence was never addressed.
The abruptness of Seven’s departure was striking. His character was integrated into the family, and then, without warning, he was gone. The show never provided a reason for his disappearance, leaving viewers to wonder what happened to the character and why he was removed from the storyline.
4. Mr. Turner – Boy Meets World

Mr. Turner, portrayed by Anthony Tyler Quinn, was a beloved teacher and mentor to Shawn Hunter on Boy Meets World. He was a significant figure in Shawn’s life, offering guidance and support. However, after a motorcycle accident in the fourth season, Mr. Turner was written out of the series, and his fate was never fully explained.
The show’s creators never provided a clear reason for Mr. Turner’s departure. While some fans speculated that the character was written off due to actor Anthony Tyler Quinn’s availability, the lack of closure left viewers with unanswered questions about what happened to the character and why he was no longer part of Shawn’s life.
5. Mutt Schitt – Schitt’s Creek

Mutt Schitt, portrayed by Tim Rozon, was the son of Roland and Jocelyn Schitt on Schitt’s Creek. He was a love interest for Alexis Rose and had a laid-back, bohemian lifestyle. After the third season, Mutt’s character was written out of the series, and he was never seen or mentioned again.
The absence of Mutt was noticeable, especially considering his relationship with Alexis and his role in the town’s social fabric. The show never provided an explanation for his disappearance, leaving fans to wonder about the character’s fate and why he was no longer part of the storyline.
6. Celia Hodes – Weeds

Celia Hodes, portrayed by Elizabeth Perkins, was a central character in the early seasons of Weeds. She was a friend and neighbor to Nancy Botwin, often providing comic relief and social commentary. However, after the fourth season, Celia’s character was written out of the series, and her absence was never fully explained.
The show’s creators never addressed why Celia was no longer part of the storyline. While some speculated that Elizabeth Perkins’ departure was due to creative differences, the lack of closure left fans with questions about what happened to the character and why she was removed from the series.
7. Ben Geller – Friends

Ben Geller, portrayed by Cole Sprouse, was Ross Geller’s son from his first marriage to Carol. He made several appearances throughout the Friends series, often staying with Ross during his visits. However, after the eighth season, Ben was no longer seen or mentioned, and his absence was never explained.
The sudden disappearance of Ben was noticeable, especially considering his relationship with Ross and the other characters. The show never provided a reason for his absence, leaving viewers to wonder what happened to the character and why he was no longer part of the group.
8. Sara Spooner – The King of Queens

Sara Spooner, portrayed by Lisa Rieffel, was Carrie’s younger sister on The King of Queens. She was introduced in the first season as a free-spirited and somewhat irresponsible character. After a few episodes, Sara was written out of the series without explanation, and her absence was never addressed.
The lack of closure regarding Sara’s departure was striking. The show never provided a reason for her disappearance, and her character was never mentioned again. This left fans puzzled about what happened to Sara and why she was no longer part of the storyline.
9. Nebula Lawrence – Boy Meets World

Nebula Lawrence, portrayed by Krystee Clark, was Topanga’s older sister on Boy Meets World. She appeared in the first season as a peace-loving, hippie character. After her initial appearance, Nebula was never seen or mentioned again, and her absence was never explained.
The sudden disappearance of Nebula was perplexing, especially considering the show’s focus on family dynamics. The lack of explanation for her absence left fans wondering what happened to the character and why she was no longer part of the series.
10. Brendan Lambert – Step by Step

Brendan Lambert, portrayed by Josh Byrne, was Frank’s youngest son on Step by Step. He was part of the blended family dynamic and appeared regularly in the early seasons. However, after the fourth season, Brendan was written out of the series, and his absence was never addressed.
The show’s creators never provided an explanation for Brendan’s departure. His sudden disappearance left fans with questions about what happened to the character and why he was no longer part of the family dynamic.
11. Eric Tramer – Saved by the Bell

Eric Tramer, portrayed by Joshua Hoffman, was Jessie’s stepbrother on Saved by the Bell. He was introduced in the episode “My Wicked Stepbrother,” where he caused tension among the group with his rebellious behavior. After the two-part storyline, Eric was never seen or mentioned again, and his absence was never explained.
The lack of closure regarding Eric’s departure was noticeable. The show never provided a reason for his disappearance, leaving viewers to wonder what happened to the character and why he was no longer part of the group.
12. Detective Daniels – Brooklyn Nine-Nine

Detective Daniels, portrayed by Katey Sagal, was introduced in the pilot episode of Brooklyn Nine-Nine. She was a friend of Detectives Hitchcock and Scully and was part of the precinct’s team. After the pilot, Daniels was never seen or mentioned again, and her absence was never explained.
The sudden disappearance of Detective Daniels was unusual, especially considering the show’s ensemble cast. The lack of explanation for her absence left fans curious about what happened to the character and why she was no longer part of the team.
13. Dr. Grace Miller – The West Wing

Dr. Grace Miller, portrayed by Anne De Salvo, was a recurring character on The West Wing. She was the personal physician to President Bartlet and appeared in several episodes. However, after the second season, Dr. Miller was written out of the series, and her absence was never addressed.
The show’s creators never provided an explanation for Dr. Miller’s departure. Her sudden disappearance left fans with questions about what happened to the character and why she was no longer part of the President’s staff.
14. Ho-Jon – M*A*S*H

Ho-Jon, portrayed by Allan Arbus, was a Korean houseboy who worked at the 4077th Mobile Army Surgical Hospital during the Korean War. He appeared in several episodes, often providing comic relief and cultural insights. However, after the first few seasons, Ho-Jon was written out of the series, and his absence was never explained.
The lack of explanation for Ho-Jon’s departure was notable. The show never addressed why he was no longer part of the camp, leaving viewers to wonder what happened to the character and why he was written out of the series.