John Roxton

Lord John Roxton was a 19th century Earth adventurer, and a member of the Diogenes Club. He helped the Seventh Doctor and Sherlock Holmes with their investigation of Baron Maupertuis. (PROSE: All-Consuming Fire)

Behind the scenes
Roxton was originally a fictional character in the Professor Challenger books by Sir Arthur Conan Doyle. He was played by Tom Ward in a 2001 film version of The Lost World and by John de Lancie in a radio drama version.