Kovarian's shuttle had a crew of 20. (TV: A Good Man Goes to War)
By one account of the Doctor and Susan's escape from Gallifrey, Susan explored the TARDIS, finding evidence that led her to believe that it had once had a large crew when it served in the time fleet. (AUDIO: The Beginning) When Steven Taylor joined the TARDIS, Vicki Pallister corrected his assumption of joining the crew, noting that the First Doctor was the crew and they were but passengers. The Doctor noted though that they were very welcome passengers. (TV: The Time Meddler [+]Loading...["The Time Meddler (TV story)"])