The First Doctor begins the series as a rather violent, gruff old man. Afterward, he softens noticeably, and due to the influence of his human companions, he becomes a much kinder and involved man, unwilling to remain detached when injustice arises. With his time-ship the TARDIS, and companions Ian, Barbara, Vicky, Steven, Katarina, Sara, Dodo, Polly, Ben, and granddaughter Susan, this first incarnation of the Doctor can be a friendly grandfather figure at times.