Doctor Who: Time Crash 17 years old

After Martha Jones parts company with the Doctor, his TARDIS collides with another, and he comes face to face with one of his previous incarnations.

Credits

Doctor Who: Time Crash Cast

Name	Character
David Tennant He was 36, now 53 years old	as Tenth Doctor
Peter Davison He was 56, now 73 years old	as Fifth Doctor

Doctor Who: Time Crash Crew

Name	Department
Steven Moffat as Writer. He was 45 (now 63) years old	Writing