In the conclusion of the six-part story "The Chase," the Doctor and his travelling are thrown into a prison cell by the Mechanoids. Also incarcerated is another space fugitive, pilot Steven Taylor. With the help of their new friend, the Doctor and his friends are able to help determine the outcome of the showdown between the Mechanoids and the Daleks. With this episode, Peter Purves became a series regular as Steven Taylor. Written by Terry Nation, "The Planet of Decision" was originally telecast on June 26, 1965. ~ Hal Erickson, Rovi