This is the only episode where the viewers see the paperboy rearranging the letters on the "Fawlty Towers" sign in the opening shot to "Watery Fowls"
This is the longest episode, with a running time of 36:16. The other episodes have a running time of approximately 30 minutes.
John Cleese and Nicky Henson (Johnson) were actually close friends. Henson passed away at age 74 on 15 December 2019 after a 20 year battle with cancer.
Basil states that at one time he considered being a surgeon. John Cleese's Monty Python co-star Graham Chapman was actually in medical school at Cambridge University and wanted to be a surgeon before his acting career took off. Cleese similarly rejected a career in law.
The sign reads "Watery Fowls". The letters have been rearranged and a "t" is missing.