[1] As London prepares for Christmas, newspapers report the theft of a near-priceless gemstone, the "Blue Carbuncle", from the Countess of Morcar's hotel suite.

Ultimately, Peterson takes the goose home for dinner and Holmes keeps the hat to study as an intellectual exercise, deducing Baker's age, social standing, intellect, and domestic status.

Realising that he is not the only one aware of the goose's importance, Holmes tricks the dealer into revealing that the bird was supplied to him by its breeder, a Mrs Oakshott of Brixton.

After being confronted with the jewel back at Baker Street, a remorseful Ryder admits that he and his accomplice, the Countess's maid, had contrived to frame Horner, as his criminal past would make him an easy scapegoat.

[8] The animated television series Sherlock Holmes in the 22nd Century featured an adaptation of the story, replacing the goose with a blue stuffed toy called "Carbuncle" and the stone with a microprocessor.

[20] On 17 January 1961, "Den Forsvunne Gåsesteken (The Lost Goose)", adapted by Gunnar Lie and directed by Barthold Halle, was broadcast on Norwegian radio with Erling Lindahl as Sherlock Holmes and Einar Vaage as Dr.

[22] On 26 November 1976, "Błękitny brylant księżnej Morcar (The Blue Carbuncle)", adapted by Robert Dlugoborski & Krzysztof Adamski and directed by Zofia Rakowiecka & Rena Tomaszewska, was broadcast on Polish radio with Piotr Fronczewski as Sherlock Holmes and Jerzy Tkaczyk as Dr.

[23] "The Adventure of the Blue Carbuncle" was adapted by Murray Burnett as an episode of CBS Radio Mystery Theater featuring Kevin McCarthy as Sherlock Holmes and Court Benson as Dr. Watson.

The episode was adapted by Bert Coules, and featured Peter Blythe as James Ryder, Ben Onwukwe as John Horner, and Christopher Good as Peterson.

[29] In 2023, the podcast Sherlock&Co adapted the story in a two-episode adventure called "The Blue Carbuncle", starring Harry Attwell as Holmes and Paul Waggot as Watson.