The Daleks assemble the leaders of several alien empires, apparently intending to unite them in an Alliance which will then declare war on Earth. In fact, each empire has brought components or technology which the Daleks require to construct the ultimate weapon - a Time Destructor. The last component they require is the power source, a core of the rare element Taranium - and Mavic Chen, the Guardian of the Solar System, intends to supply it to them and then betray them, seizing the Time Destructor for himself. The Doctor and his companions stumble into this affair when the TARDIS materialises on Kembel, and with the aid of Space Security Service agent Bret Vyon, sent to investigate the disappearance of Marc Cory, the Doctor steals the taranium core. The Daleks pursue the Doctor and his companions across the galaxy to get it back, and in the course of the flight the Trojan handmaiden Katarina gives her life to help the Doctor escape from a vicious criminal.
        s03e01 - Four Hundred Dawns (1)
          
        
      
    
        s03e02 - Trap of Steel (2)
          
        
      
    
        s03e03 - Air Lock (3)
          
        
      
    
        s03e04 - The Exploding Planet (4)
          
        
      
    
        s03e05 - Mission to the Unknown
          
        
      
    
        s03e06 - Temple of Secrets (1)
          
        
      
    
        s03e07 - Small Prophet, Quick Return (2)
          
        
      
    
        s03e08 - Death of a Spy (3)
          
        
      
    
        s03e09 - Horse of Destruction (4)
          
        
      
    
        s03e10 - The Nightmare Begins (1)
          
        
      
    
        s03e11 - Day of Armageddon (2)
          
        
      
    
        s03e12 - Devil's Planet (3)
          
        
      
    
        s03e13 - The Traitors (4)
          
        
      
    
        s03e14 - Counter Plot (5)
          
        
      
    
        s03e15 - Coronas of the Sun (6)
          
        
      
    
        s03e16 - The Feast of Steven (7)
          
        
      
    
        s03e17 - Volcano (8)
          
        
      
    
        s03e18 - Golden Death (9)
          
        
      
    
        s03e19 - Escape Switch (10)
          
        
      
    
        s03e20 - The Abandoned Planet (11)
          
        
      
    
        s03e21 - Destruction of Time (12)
          
        
      
    
        s03e22 - War of God (1)
          
        
      
    
        s03e23 - The Sea Beggar (2)
          
        
      
    
        s03e24 - Priest of Death (3)
          
        
      
    
        s03e25 - Bell of Doom (4)
          
        
      
    
        s03e26 - The Steel Sky (1)
          
        
      
    
        s03e27 - The Plague (2)
          
        
      
    
        s03e28 - The Return (3)
          
        
      
    
        s03e29 - The Bomb (4)
          
        
      
    
        s03e30 - The Celestial Toyroom (1)
          
        
      
    
        s03e31 - The Hall of Dolls (2)
          
        
      
    
        s03e32 - The Dancing Floor (3)
          
        
      
    
        s03e33 - The Final Test (4)
          
        
      
    
        s03e34 - A Holiday for the Doctor (1)
          
        
      
    
        s03e35 - Don't Shoot the Pianist (2)
          
        
      
    
        s03e36 - Johnny Ringo (3)
          
        
      
    
        s03e37 - The O.K. Corral (4)
          
        
      
    
        s03e38 - The Savages (1)
          
        
      
    
        s03e39 - The Savages (2)
          
        
      
    
        s03e40 - The Savages (3)
          
        
      
    
        s03e41 - The Savages (4)
          
        
      
    
        s03e42 - The War Machines (1)
          
        
      
    
        s03e43 - The War Machines (2)
          
        
      
    
        s03e44 - The War Machines (3)
          
        
      
    
        s03e45 - The War Machines (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...