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| Colonel Moran | |
|---|---|
| Sherlock Holmes character | |
 Colonel Moran is arrested in "The Adventure of the Empty House". Illustration by Sidney Paget. | |
| First appearance | "The Adventure of the Empty House" |
| Created by | Arthur Conan Doyle |
| In-universe information | |
| Full name | Sebastian Moran |
| Gender | Male |
| Title | Colonel |
| Nationality | British |
Colonel Sebastian Moran is a fictional character in the stories written by Arthur Conan Doyle. An enemy of Sherlock Holmes, he first appears in the 1903 short story "The Adventure of the Empty House". Holmes once described him as "the second most dangerous man in London", the most dangerous being Professor Moriarty, Moran's employer.