Date: July 1912 (the newspaper reporting the events of the climactic race at 47'47" is dated July 27th).

The scene in the railway carriage (3') features Pam St Clement, later to be well known as Pat Butcher in Eastenders.

Geoffrey Whitehead (Sir Geoffrey Truscott) had been seen previously in the bizarre Upstairs, Downstairs episode The Swedish Tiger, playing Captain Ryttsen.

Goof: Truscott talks about winning a Grand Prix "should they ever return" (7'38"). Although there had been no Grand Prix races between 1909 and 1911, the French Grand Prix had been held at Dieppe on 25th & 26th June 1912, which is before the date of this episode.

Goof: It is mentioned that Felice Nazzaro won the Targa Florio "four years ago". He won it in April 1907, which is five years ago. (He won the Coppa Florio in 1908, which is were the confusion may have stemmed from.) (18'17")

Sarah background: She seems to be able to speak fluent French (25'52"). She used to live in France when she was a little girl (26'47"). These facts seem to be a belated explanation for the knowledge of French songs and pronunciation that Sarah displays in the original series. There is a restatement here that her name is Sarah Moffat/Moffatt/Mofatt, and she uses the alias(?) Clémence Dumas once again.

The beach location work for this episode was done on Pendine Sands in south Wales, the actual scene of many attempts on various land-speed records by Malcolm Campbell and others.

The band music behind the scene on the pier at 39' is John Philip Sousa's The Liberty Bell, composed in 1893. The second piece (40') is There's A Tavern In The Town, a traditional pub song (sometimes attributed to William H Hills).