25 (number)

25 was a number.

The Fifth Doctor defined a generation as twenty-five years. (TV: Four to Doomsday)

By 2022, Abby McPhail was 25 years old. (AUDIO: SOS)

Behind the scenes
According to NOTVALID: The Last Dalek, a video game based on the events of TV: Dalek, Diana Goddard was 25 years old in 2012.