- Wikipedia: Hugo Oberstein (link not verified)
- 1904 ▷ Appeared once in 'Canon'.
Dec 1904: 'The Adventure of the Second Stain'
- 1988 ▷ Played by Derek Ware once on Television in '1984 Granada TV'.
27 Apr 1988: 'The Bruce-Partington Plans'
- 1991 ▷ Played by Paul Humpoletz once on Television in 'Sherlock Holmes the Golden Years'.
06 Dec 1991: 'Sherlock Holmes and the Leading Lady'