Doctor Who (Original Series) First Doctor 4 Series 30 Serials 136 Episodes Rated: PG
The first incarnation of the Doctor was portrayed by William Hartnell. During Hartnell's tenure, the episodes were a mixture of stories set on Earth of the future with extraterrestrial influence, on alien planets, and in historical events without extraterrestrial influence, such as Marco Polo, one of the lost serials. In his last story, The Tenth Planet, the Doctor gradually grew weaker to the point of collapsing at the end of the fourth episode, leading to his regeneration.
Planet of the Giants 1 Planet of the Giants (Part 1)           2  Dangerous Journey (Part 2)             3  Crisis (Part 3)   The Dalek Invasion of Earth   4  World's End (Part 1)             5  The Daleks (Part 2)           6  Day of Reckoning (Part 3)           7  The End of Tomorrow (Part 4)           8  The Waking Ally (Part 5)           9  Flashpoint (Part 6) The Rescue   10  The Powerful Enemy (Part 1)             11  Desperate Measures (Part 2)   The Romans   12  The Slave Traders (Part 1)             13  All Roads Lead to Rome (Part 2)             14  Conspiracy (Part 3)             15  Inferno (Part 4)   The Web Planet    16  The Web Planet (Part 1)             17  The Zarbi (Part 2)             18  Escaoe to Danger (Part 3)             19  Crater of Needles (Part 4)             20  Invasion (Part 5)             21  The Centre (Part 6)   The Crusade   22  The Lion (Part 1)             23  The Knight of Jaffa (Part 2) Reconstruction             24  The Wheel of Fortune (Part 3)             25  The War Lords (Part 4) Reconstruction   The Space Museum   26  The Space Museum (Part 1)             27  The Dimensions of Time (Part 2)             28  The Search (Part 3)             29  The Final Phase (Part 4)   The Chase   30  The Executioners (Part 1)             31  The Death of Time (Part 2)             32  Flight Through Eternity (Part 3)             33  Journey Into Terror (Part 4)             34  The Death of Doctor Who (Part 5)             35  The Planet of Decision (Part 6)   The Time Meddler   36  The Watcher (Part 1)             37  The Meddling Monk (Part 2)             38  A Battle of Wits (Part 3)             39  Checkmate (Part 4)