|First Appearance:||Mother Russia|
|Portrayed by:||Peter Purves|
Steven Taylor was a space pilot who was captured by Mechanoids and kept in their city. He met the Doctor, Barbara Wright, Ian Chesterton and Vicki Pallister and they saved him from his prison. However, he stowed away on the TARDIS where he was found by the Doctor and Vicki and after Barbara and Ian had left. He then joined the TARDIS crew. After Vicki left, he fought alongside other companions, including Katarina, Sara Kingdom and Dodo Chaplett.
In 1812, the Doctor, Steven and Dodo Chaplett, stayed in Russia, near Moscow where they were attacked by an alien creature who'd recently arrived in a spaceship. Steven tried helping Semian Borisovitch Starzoff, but found him killed. Following his death, Steven discovered that the Doctor and Dodo were turning against him and found himself in the middle of the French attack led by Napoleon Bonaparte. Heading to Moscow, Steven found a fake Doctor giving idea to Napoleon about his attack and so with the help of the real Doctor, they managed to stop him, but barely. (Mother Russia)