Reece Dinsdale was 25 when the series began, but his character was a 17-year old still at school. It also meant that in the final episode, as he went to University, (presumably as an 18 year old) he was 30.
The series got very mixed reviews from the UK press when it was first shown but viewer numbers were still extremely good.
Elizabeth Bennett, who played Enid the housekeeper, also played Enid the housekeeper in the American remake of this sitcom, Du schon wieder (1986).
There was a 2 year gap between the third and final fourth series, as, in 1987, John Thaw was starring in Inspector Morse, (and various other projects) and was unavailable until late in 1989.
The series was re run on Forces TV during September 2020. And more recently on "That's TV" in the Autumn of 2024.