Doctor Who - Travel Companions of the Doctor By ehx 1 CE 1x01 - An Unearthly Child Period: 1 CE to 51 Susan Foreman Period: 1 CE to 77 Ian Chesterton Period: 1 CE to 77 Barbara Wright 51 2x09 - Flashpoint 52 2x10 - The Powerful Enemy Period: 52 to 90 Vicki 77 2x35 - The Planet of Decision Period: 77 to 122 Steven Taylor 90 3x09 - Horse of Destruction Period: 90 to 94 Katarina 94 3x13 - The Traitors 106 3x05 - Bell of Doom Period: 106 to 124 Dorothea Chaplet 124 3x43 - The War Machines, Episode 2
