Having been displaced across a 'time track' the TARDIS with the Doctor et al arrives on the planet Xeros. There the travellers find their future selves displayed in a museum! The museum is actually a monument to the conquests of belligerent invaders (Moroks) who now rule Xeros. When time shifts back to normal, the Doctor realises that he and his companions have to do whatever they can to try to avert this future. They help the native people of Xeros to revolt against the Moroks. The revolution succeeds, the future is changed, and the travellers depart in the TARDIS.
        s02e01 - Planet of Giants (1)
          
        
      
    
        s02e02 - Dangerous Journey (2)
          
        
      
    
        s02e03 - Crisis (3)
          
        
      
    
        s02e04 - World's End (1)
          
        
      
    
        s02e05 - The Daleks (2)
          
        
      
    
        s02e06 - Day of Reckoning (3)
          
        
      
    
        s02e07 - The End of Tomorrow (4)
          
        
      
    
        s02e08 - The Waking Ally (5)
          
        
      
    
        s02e09 - Flashpoint (6)
          
        
      
    
        s02e10 - The Powerful Enemy (1)
          
        
      
    
        s02e11 - Desperate Measures (2)
          
        
      
    
        s02e12 - The Slave Traders (1)
          
        
      
    
        s02e13 - All Roads Lead to Rome (2)
          
        
      
    
        s02e14 - Conspiracy (3)
          
        
      
    
        s02e15 - Inferno (4)
          
        
      
    
        s02e16 - The Web Planet (1)
          
        
      
    
        s02e17 - The Zarbi (2)
          
        
      
    
        s02e18 - Escape to Danger (3)
          
        
      
    
        s02e19 - Crater of Needles (4)
          
        
      
    
        s02e20 - Invasion (5)
          
        
      
    
        s02e21 - The Centre (6)
          
        
      
    
        s02e22 - The Lion (1)
          
        
      
    
        s02e23 - The Knight of Jaffa (2)
          
        
      
    
        s02e24 - The Wheel of Fortune (3)
          
        
      
    
        s02e25 - The Warlords (4)
          
        
      
    
        s02e26 - The Space Museum (1)
          
        
      
    
        s02e27 - The Dimensions of Time (2)
          
        
      
    
        s02e28 - The Search (3)
          
        
      
    
        s02e29 - The Final Phase (4)
          
        
      
    
        s02e30 - The Executioners (1)
          
        
      
    
        s02e31 - The Death of Time (2)
          
        
      
    
        s02e32 - Flight through Eternity (3)
          
        
      
    
        s02e33 - Journey into Terror (4)
          
        
      
    
        s02e34 - The Death of Doctor Who (5)
          
        
      
    
        s02e35 - The Planet of Decision (6)
          
        
      
    
        s02e36 - The Watcher (1)
          
        
      
    
        s02e37 - The Meddling Monk (2)
          
        
      
    
        s02e38 - A Battle of Wits (3)
          
        
      
    
        s02e39 - Checkmate (4)
          
        
      
    Doctor Who is the longest-running science fiction TV series in history, airing initially from 1963 to 1989. Doctor Who is about ideas. It pioneered sophisticated mixed-level storytelling. Its format was the key to its longevity: the Doctor, a mysterious traveller in space and time, travels in his ship, the TARDIS. The TARDIS can take him and his companions anywhere in time and space. Inevitably he finds evil at work wherever he goes...