Jack

Jack was a Humanoid from a different planet similar to earth, he travelled with the Doctor and could pilot the tardis just as well.

His face was nearly identical to the 16th/17th/4th Incarnation of the Doctor who only appeared once before regeneration Into Thomas Jones’s Doctor.

he owned a Wooden/ Cardboard Console room before it was changed into a bigger more sophisticated room.

Not much is yet known about him.