The Dinosaur effects were created by the same team that had just completed the now-legendary Nel mondo dei dinosauri (1999) TV series. In addition, the Entelodont from I predatori della preistoria (2001) makes an appearance.
Brian Blessed was the original choice for the Bob Hoskins role but his casting was vetoed by the American networks.
Professor Challenger talks to Summerlee about his life as a young boy, that he was raised by his parents under the Bible. Then as he became more interested in Science, his father had "lost" him. This is similar to his creator, Sir Arthur Conan Doyle, and his own religious experiences. He too, was a scientist that was raised Catholic and became more supportive of Spiritualism.
Of all the movie versions of "The Lost World," this is the only one set at an earlier time than Doyle's original novel. The book took place in 1912, and The Lost World (2001) is set in 1911.
The Lost World (2001) is a 2001 British made-for-television film adaptation of the 1912 novel of the same name by Arthur Conan Doyle, directed by Stuart Orme and adapted by Tony Mulholland and Adrian Hodges. It was filmed at various locations on the West Coast of New Zealand. The 145-minute film was divided into two 75-minute episodes when broadcast on BBC One on December 25 and 26, 2001, receiving 8.68 million and 6.98 million viewers respectively. Bob Hoskins played Professor Challenger and was supported by James Fox, Peter Falk, Matthew Rhys, Tom Ward and Elaine Cassidy.