Date: The weather shown seems to be a mixture of cold (fires, coats) and warmth (open windows, summer blouses). Given the dating of the previous episode, and given that Thomas and Sarah were lent the house for (about) three months, then March-ish 1913? It seems to be getting dark at 5.40 p.m.-ish (10'35") which fits in with this.

Sarah background / Thomas background: The house they occupy during this episode is 12 Hyde Park Square. Sarah once "had" (past tense) a second cousin called Bella who did well for herself "till she lost her looks" (15'53"). Sarah can play the piano (24'31").

Goof: The position of the items on the tray changes as it is carried up to the drawing room (1'55").

Nigel Hawthorne plays the upright butler Wilson in this episode. Hawthorne started out with small roles on stage and television which expanded gradually throughout the 1960s and 1970s. By the early 1980s he was famous as Sir Humphrey Appleby in the highly popular political comedy Yes Minister (1980-4, and its sequel Yes, Prime Minister, 1986-8) – a favourite programme of prime minster Mrs Thatcher! He appeared on stage in Alan Bennett's The Madness Of George III and reprised the role for a 1994 film version for which he was nominated for an Oscar. After numerous other acting awards, he was knighted in 1999. He died in 2001 after a long battle with pancreatic cancer.

Linda Robson (Nelly) became well known later on for her sitcom role as the wife of an Essex villain in Birds Of A Feather (1989-98 & 2014-). Prior to this her TV appearances had included post-war comedy Shine On Harvey Moon (1982-5 & 1995).

Goof?: In this episode, Sir Joseph Weidler seems to be a genuine financier. So why, in the previous episode, was he shown to be part of a small-time con with Charlie-"Boy" Greatley?

Goof: Thomas mentions Willie (William) Morris' name alongside that of Herbert Austin. The implication is that the former is also a well-known success story in the field of motor cars. But Morris was still small fry at the time of the episode and had not yet produced his first car.

At 24'31" Sarah sings the traditional Strawberry Fair.

The record being played as Thomas and Sarah creep down to the servants' hall is A Bird In A Gilded Cage, composed by Harry Von Tilzer (aka Harry Gumm, 1872-1946).

The next record is The Mountains Of Mourne written by Irish musician Percy French in 1896. It's about the experiences of an Irish immigrant who has come to live in London.

The drunken song being sung in the servants' hall (39'48") is Everybody's Doing It Now (from the stage musical Everybody's Doing It) written by Irving Berlin in 1911.