The scene of Col. Brandon shooting with Sir John Middleton was not in Andrew Davies's script. It was added at the suggestion of Mark Williams (Sir John), who was keen to include a scene between the two men, and being a historical gun enthusiast, wanted an opportunity to showcase his expertise.
The scene in the carriage of the Dashwood ladies on their return to Barton from Cleveland was actually shot as a scene of Marianne and Elinor on their way to Cleveland from London. During post production, it was felt that the scene would fit better after Marianne's self-discovery that takes place following her illness at Cleveland, so it was moved. The shot of Mrs. Dashwood in the carriage is actually from an earlier scene. Note that the upholstery in the close-up of Mrs. Dashwood is different from the upholstery in the close-ups of Elinor and Marianne.
Script writer Andrew Davies modeled the character of chubby, over-indulged Harry Dashwood, son of John and Fanny, after the character Eric Cartman in the animated series South Park (1997). Davies wanted to portray Harry eating "cheesy-poofs" in every scene. (Fruit crisps were substituted for cheesy-poofs.)
The brown velvet gown with white lace tucker worn by Charity Wakefield as Marianne Dashwood during the scene in which Marianne and Elinor pack books in Norland's library is the same gown Keira Knightley wears as Elizabeth Bennet in Pride & Prejudice (2005). Knightley wears it during Elizabeth's second visit to Pemberley.
The pink gown with embroidered chiffon overdress worn by one of the dancers at the London ball is the same costume worn by Julia Sawalha (Lydia Bennet) in Pride and Prejudice (1995) when Mr. Collins finds her half-dressed in the hall at Longbourn.
The pale pink gown with cerise ruffle along the neckline worn by a guest at the London ball is the same gown worn by Victoria Hamilton (Mrs.Forster) to the Bennet's farewell dinner for the militia in Pride and Prejudice (1995), by a guest at the Crown Ball in Emma (1996), by a ball guest in Mansfield Park (1999), by an extra attending the play at the asylum in Quills (2000), and by an extra at the London ball where Lady Caroline Lamb dances the waltz in Byron (2003).
The pale yellow and green print dressing gown Hattie Morahan (Elinor Dashwood) wears at Barton Cottage while her mother brushes her hair is the same costume worn by Carey Mulligan (Kitty Bennet) at Longbourn the morning after the Netherfield Ball in Pride & Prejudice (2005).
The pale blue dress with checked trim on the sleeves Anna Madeley (Lucy Steele) wears when Edward calls at Mrs. Jennings' London house is the same costume Emma Thompson (Elinor Dashwood) wears at Barton Cottage in Sense and Sensibility (1995). The gown is also worn by a guest at the Meryton Assembly Ball in Pride & Prejudice (2005).
The plum-colored caped coat and matching hat Claire Skinner (Fanny Dashwood) wears to travel to Norland is the same costume Barbara Leigh-Hunt (Lady Cumnor) wears to visit the Gibsons in Wives and Daughters (1999). The hat is also worn in Byron (2003) by an extra at the London party where Byron meets Annabella Milbanke.
The white gown with pink and gold stripes and side closure Daisy Haggard (Anne Steele) wears to the London ball is the same gown worn in Byron (2003) by an extra at the London party where Byron meets Annabella Milbanke.
The yellow and brown striped waistcoat Mark Williams (Sir John Middleton) wears when the Dashwoods arrive at Barton Cottage is the same costume Nicholas Jones (the Merdles' butler) wears in Little Dorrit (2008).
The black Spencer with flowers embroidered on the collar and sleeves worn by an extra in the London street when the Dashwoods arrive in London is the same costume worn by Jackie Smith-Wood (Mary Crawford) to walk with Fanny in Mansfield Park (1983), by an extra at the wedding in Pride and Prejudice (1995), and by Natasha Little (Augusta Leigh) to visit Byron at his London apartment in Byron (2003).