Barbara Wright played by Jacqueline Hill
Barbara was a history teacher at the Coal Hill school. Eager to find out more about Susan's advanced knowledge she and Ian Chesterton followed Susan back to Totter's Lane. Thinking Susan was being held captive in a police box she forced her way into the TARDIS.
Being a history teacher Barbara was able to see the periods which she taught about, although when the Daleks' time machine became available she and Ian were able to return to their own time.