When Mr. Tebbs appears on the shop floor wearing a wig, Mr. Humphries jokes that if he "trimmed his moustache off, he could get a job as Harry Secombe", who was a well known actor at that time. James Hayter, who plays Mr Tebbs, worked with Harry Secombe in the musical version of Oliver! (1968). James Hayter played the bookstore owner, and Harry Secombe played the bumbling Mr Bumble.
Mr Grace's nurse's stocking top is revealed on several occasions.
Mrs. Slocombe nonchalantly relates to Miss Brahms that her cat is missing. A few seasons later, her cat is missing, and she is hysterical.