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
Starring: Reg Varney, Anna Karen, Stephen Lewis, Bob Grant
Genres: Comedy
Continuity mistake: At the end when Stan comes out of the manager's office to explain what happened when the bus got stuck under the low bridge, Stan and Jack drive out in the same bus that hit the bridge which was badly damaged but now is suddenly repaired.
Trivia: Even though Doris Hare played Reg Varney's mother in the series, she was only 11 years older than him.