The Other Darrin: Every single character was recast at least once over the course of the whole show. All the kids in the cast were recast after the first series and again after the second series, due to having aged. Tony was recast for the last two series due to the original actor having severe Parkinson's Disease. Nell was also recast for the last two series due to the original actor having terminal cancer (of which she died in 2000). Mark Mitchell replaced Frankie J Holden as Harold Gribble after the first series, and Matron Gribble was recast after the first series and again after the second series. Fay was recast for the third series and again for the fourth series. Finally Mr Snapper, who had been played by series producer Esben Storm, was recast for the fourth series.
"Lucky Lips" was scripted to revolve around Gribble, a character much closer to Marcus, the jerkass protagonist of the short story. Paul Jennings was convinced to focus it on Pete instead, as nice guys can make dumb decisions. In addition, where the script would have ended with the protagonist being kissed by the female pigs, Jennings was convinced to Throw the Dog a Bone and have Pete get a consensual kiss from Fiona, followed by Gribble being chased by the fortune teller who gave Pete the lipstick.
An episode based on the short story "Frozen Stiff" was written but cancelled, due to the cost of freezing a horse and thirty other animals in blocks of ice. An episode based on "The Copy" was quickly thrown together instead, using Jennings' desire to focus an episode on Linda and Esben Storm's request to make use of the lighthouse set.
The first series was originally supposed to end the way the short story "Lighthouse Blues" had - Nell is killed while trying to stop the demolition, and her ghost joins those of her family to scare off the developers. Thanks to an Executive Veto, Paul Jennings was forced to rewrite it.