This is The Traveler, also known by his fake name Emit Revlevart. He is a Timelord with a Tardis that once broke down in Karen Bornerville's backyard. When she helped him fix it she was offered to travel the world with him as his Companion. He said that an old friend of him allways referd to humans that he travelled with as Companions and The Treaveler liked that word. #InToTheFuture #DoctorWho #Timetravel