. . "Doctor" . . . "the Doctor" . "Third Doctor" . . "third version of Doctor Who" . "reversing the polarity of the neutron flow" . "tall, elegantly dressed man with a shock of wild white hair" . . . . "The Doctor" . . "reversing the polarity" . . . "third Doctor" . "3rd Doctor" . "The Third Doctor" . . . "3rd" . "Jon Pertwee" . . . . . "third incarnation" . . . . "third" . . . "following" . . . . "Third Doctor" . "incarnation" . . "forcibly regenerated and exiled to Earth" . . . . "Third" . . . "previous incarnation" . "Doctor 3" . . "\\\"reverse the polarity of the neutron flow\\\"" . "reverse the polarity" . "Third Doctor (Jon Pertwee)" . . . "third incarnation of Doctor Who" . "reversed the polarity" . "Third Doctor#\\\"Reverse the polarity of the neutron flow\\\"" . "Third Doctor's" .