Plot hole: In Blakey's office Stan shows Blakey the toy bus he has just brought for his nephew. How can Stan have a nephew when he isn't married and his only sibling is his sister Olive, who doesn't have any children?
On the Buses (1969)
1 plot hole in season 4 - chronological order
Starring: Reg Varney, Anna Karen, Stephen Lewis, Bob Grant
Genres: Comedy
Continuity mistake: When Stan demonstrates the toy bus on Blakey's desk everything that was on Blakey's desk top has suddenly disappeared.
Trivia: Even though Doris Hare played Reg Varney's mother in the series, she was only 11 years older than him.