Date: The music-hall poster shown at 13'26" indicates the bill changes each Monday, and this particular line-up (as seen in this episode) opens on 11th August 1911 (but see the dating goof further down). So, the majority of this episode occurs over that week, although the scenes prior to Gilbert discovering Sarah in the music hall could have been beforehand. For the final scene, the leaves on the ground indicate a date later into the autumn (i.e. Thomas and Sarah have been trying with their magic act for a few weeks by that point).

The song being sung in the pub at 0'51" is Down At The Old Bull And Bush written in 1903 by Harry von Tilzer, Russell Hunting, Percy Krone and Andrew B Sterling. It was popularised by music-hall star Florrie Ford and celebrates a pub in Hampstead (quite near to Kilburn, where Thomas and Sarah have their garage).

The song being sung at 2'41" in the pub is Let Me Call You Sweetheart from 1910 (music: Leo Friedman / lyrics: Beth Slater Whitson).

The photo the Madge shows at 3'02" (purporting to be a picture of Thomas and Sarah in Margate "last summer") is in fact a publicity photo taken during the making of the tossing-a-coin title sequence for the show. The monkey Thomas is holding in the photo can be seen sitting atop the barrel organ in the opening sequence.

Goof: The "Olympic" poster appears again (4'56") – see the Factfile for Birds Of A Feather.

Goof: Through the long drawers being worn by Sally Sanders (Carlotta), we can see some much more modern underwear (6'02").

Goof: There seems to be confusion amongst the series' writers as to whether Madge and Tubby are "in" on the fact that Thomas and Sarah are not really married. Here (at 8'05"), Thomas says to Madge that: "Ours was not a marriage like yours and Jack's." However, in Birds Of A Feather, during the conversation with Monsieur Defarge (40'), Tubby doesn't know who "Mrs Watkins" is, and Madge calls Sarah an "old girlfriend" (of Thomas) and says that Sarah is "one young lady who won't be saying: 'I do.'"

Goof: The poster says the music-hall bill changes every Monday and indicates the line-up that will start on 11th August 1911. But the 11th August was a Friday, not a Monday. (13'26")

Sarah background: In this episode she sings as part of a blackface music-hall trio called The Southern Belles. She uses the stage name of Mathilde (16'24").

As part of her stage act, Sarah sings By The Light Of The Silvery Moon from 1909 (music: Gus Edwards / lyrics: Edward Madden).

Goof: As John Alderton moves forward towards the cabinet (to tie up Naomi), he kicks up the edge of the rug on the stage and has to set it straight again (24'50").

Sarah uses the expression "dicky bird" at 32'08". This is rhyming slang for "word".

Goof: At 33'37" Madge seems almost tearful about the predicament that Thomas' sale of the garage will leave Tubby in. However, in The Silver Ghost (2'05") she was trying to persuade Thomas to sack him because he was no good!

Goof: The doorman says that the music hall is "between houses". Yet when we see Thomas and Sarah talking to Chang Le Yen in his dressing room, we can hear the sounds of the music hall in full swing (37'13"). Furthermore, since Sarah is one of the acts, it seems strange that she is dressed in her outside clothes.