- For the body part, see Digit (anatomy) .
The Project Indigo device oscillated between different digits. (TV: The Stolen Earth)
The briefcase containing the star seed featured a four-digit code which was required after closing it in order to stop the process of the current case holder being disintegrated within 15 seconds. As noted by the Fifteenth Doctor, this meant that it could be any of 10,000 different numbers. (TV: Joy to the World [+]Steven Moffat, Doctor Who Christmas Special 2024 (BBC One and Disney+, 2024).)