Joseph Stalin

Joseph Stalin, also spelled Josef Stalin, was a communist dictator of the Soviet Union. He served as the General Secretary of the Communist Party of the Soviet Union. (PROSE: History 101)

The Seventh Doctor visited an old man named Josef who had been president of his country for decades. He told Josef that, though people would vilify him for over a century, they would eventually realise that his actions were the right thing to do, and they would continue his work. Grigori subsequently slipped something into Josef's drink. (PROSE: Closing the Account)

It was said that Stalin liked to listen to the sound of mad dogs barking. (PROSE: Endgame)

When the Tenth Doctor and Rose encountered "men in black" and "vanishing police cars" in England in 1953, the Doctor compared it to Stalin's Russia. (TV: The Idiot's Lantern)

Краснодар contained a poster of Stalin. (TV: Before the Flood)

Behind the scenes

 * According to The Brilliant Book 2012, a book that contains non-narrative based information, in an alternate universe where all of history happened at once, Stalin played live chess with Cleopatra.
 * He was played by Brian Cox in an episode of Thirty-Minute Theatre, David Bradley in an episode of Theatre Night, Bernard Kay in an episode of Screen Two and Simon Russell Beale in the play Collaborators.