- Malcolm McDowell and Mary Steenburgen met and fell in love during the filming of Time After Time (1979). They later got married (but it didn't last).
- Director Nicholas Meyer's first choice for Wells was Derek Jacobi.
- The role of Amy Robbins went to Mary Steenburgen. However, the studio had wanted Sally Field. Director Meyer's first choice was his girlfriend, Shelley Hack. She reportedly didn't want to become famous due to her boyfriend - but she did accept a small role as a docent at the museum Wells transports into.
- Both stars, Malcolm McDowell and David Warner, played the Wing Commander character Admiral Geoffrey Tolwyn: McDowell in Wing Commander III: Heart of the Tiger (1994) (VG) and Wing Commander IV: The Price of Freedom (1995) (VG), and Warner in Wing Commander (1999).
- When Wells gives a false name to the police, he uses "Sherlock Holmes". And one of the police officers is named Inspector Gregson, a character from the original Sherlock Holmes stories. Also, director Nicholas Meyer wrote "The Seven Per-cent Solution", which is considered to be one of the best Sherlock Holmes story not written by Sir Arthur Conan Doyle.
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