- George A. Cooper portrayed inspector Gregson in the 1960s BBC TV series, in the episodes A Study in Scarlet and The Greek Interpreter.
- In the 1979-1986 Soviet series The Adventures of Sherlock Holmes and Dr Watson, inspector Gregson was a minor recurring character, portrayed by Russian actor Igor Dmitriev.
- Inspector Gregson's sole appearance in the Granada Television series occured in the episode The Greek Interpreter. He was played by Oliver Maguire.
- In Sherlock Holmes in the 22nd Century, the 22nd century equivalent of Gregson is Chief Inspector Greyson, voiced by William Samples.
- New York City Police Department employee captain Thomas Gregson from Elementary is a modern counterpart to the Canon's Gregson. Unlike the original Gregson character, this Gregson is American, not British. He also appears with far greater regularity, effectivelly serving a role similar to that usually assigned to inspector Lestrade in most television adaptations.
|Sherlock Holmes Canon|
|Sherlock Holmes • John Watson • Mycroft Holmes • Professor Moriarty • Inspector Lestrade • Irene Adler|
|Mary Watson • Mrs Hudson • Tobias Gregson • Athelney Jones • Sebastian Moran|
|A Study in Scarlet • The Sign of the Four • The Hound of the Baskervilles • The Valley of Fear|
|Short story collections|
|The Adventures of Sherlock Holmes • The Memoirs of Sherlock Holmes • The Return of Sherlock Holmes|
His Last Bow • The Case-Book of Sherlock Holmes
|Behind the scenes|
|Arthur Conan Doyle • The Strand Magazine • Sidney Paget • Chronology of Sherlock Holmes Cases|
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