| Sebastian Wilkes |
|Affiliation||Shad Sanderson Bank|
|Behind the scenes|
|Appearances||"The Blind Banker"|
|Portrayed by||Bertie Carvel|
Sebastian 'Seb' Wilkes is an investment banker – Director of the Trading Floor at Shad Sanderson in London. He is an acquaintance of Sherlock Holmes, whom he met at university. He remarks that even at university Sherlock was performing his deduction skills on people.
Described by John Watson as a "heartless bastard", Sebastian shows somewhat eccentric and extravagant tendencies. He frequently travelled abroad and did very well economically, since he was a bank chairman and dressed with vanity. He was carefree in hiring Sherlock Holmes and in joking about their days in university.