All the information listed below has not been verified by any historical authority.  With many of the biographies, it is not certain that the information is fully accurate.  The information that has been selected is based on whatever dramaturgical evidence the production has pieced together.  Sources include: www.spartacus.schoolnet.co.uk and www.wordiq.com.

In order of appearance in the show

BORIS VIKTOROVICH SAVINKOV (1879-1925) is the historical revolutionary upon which the character of Boris (Boria) Annenkov is based.  He was a famous writer and terrorist, one of the leaders of the Fighting Organisation of the Socialist-Revolutionary Party, and was responsible for the most spectacular assassinations of imperial officials in 1904 and 1905. In 1906. arrested, but he escaped from prison in Odessa. He returned to Russia in April 1917 and became Assistant War Minister under A.F. Kerensky , but he was soon expelled from the government and Socialist-Revolutionary Party because of his role in the uprising of General Lavr Kornilov (September of 1917). He was a counter-revolutionary in Russia during the period after the October revolution.He was an acquaintance of Sidney Riley, the legendary renegade British agent, and was involved in a number of "counter-revolutionary" plots against the Bolsheviks, sometimes collaborating with the British Secret Intelligence Service (SIS). He is believed to have been a heroin addict. He committed suicide (official version) in the Lubyanka prison (Moscow), by "accidentally" falling out of 14-story building and mysteriously vanishing into the woods to die.

DORA (FANYA) KAPLAN (the closest resemblance to Dora Dulebov we could find) was born into a poor peasant family and her four brothers and two sisters were all educated at home. Her parents both emigrated to the United States. Kaplan became involved in radical politics and joined the Socialist Revolutionary Party. In 1906 she took part in a plot to kill a Tsarist official in Kiev. Kaplan was caught and sentenced to a life of hard labour in Siberia. After eleven years in Siberia she was released after the February Revolution. Like many Mensheviks and Socialist Revolutionaries, Kaplan was furious when the Bolsheviks closed down the Constituent Assembly. On 30th August, 1918, Vladimir Lenin spoke at a meeting in Moscow. As he left the building Kaplan tried to ask Lenin some questions about the way he was running the country. Just before he got into his car Lenin turned to answer the woman. At that moment Kaplan fired three shots at him. Two bullets entered his body and it was considered too dangerous to remove them. Kaplan was soon captured and in a statement she made to Cheka that night, she explained that she had attempted to kill him because he had closed down the Constituent Assembly and was a "traitor to the revolution." Fanya Kaplan was shot by Pavel Malkov, a Baltic Fleet sailor, on 3rd September, 1918. Yakov Sverdlov, who organized the execution, gave instructions that she was not to be buried. He told Malkov: "her remains are to be destroyed so that not a trace remains."

Stepan Shaumyan (1878 - 20 September, 1918) has a close biographical resesmblance to the character of Stepan Fedorov, and was an Armenian politician and revolutionary. Born to a cloth merchant in Tbilisi, Georgia, Shaumyan studied at the Petrograd and Riga Polytechnics, where he joined the Russian Social Democratic Party in the latter in 1900. In 1898-1902, studied in St. Petersburg and Riga Polytechnic Institutes. In 1905 he graduated from the Philosophy department of Berlin University. In 1905, Shaumyan graduated from Philosophy Department of Berlin University. Arrested by the Tsarist government for taking part in student politics on the campus, he was exiled back to his native Caucasia. Escaping from his exile, Shaumyan went to Germany, where he met with other exiles from the Russian Empire, notably Julius Martov, Vladimir Lenin and Georgi Plekhanov. Returning to Caucasia, Shaumyan became a teacher and also the leader of the local communists in Tbilisi, as well as a prolific writer of pro-Marx literature. At the 1903 Congress, he sided with the Bolsheviks. By 1907 he had moved to Baku to head up the significant Bolshevik movement in the city. In 1914, he led Baku General Strike, which was fiercly broken by the Tsar's army, and Shaumyan was sent to prison. He escaped just as the February Revolution of 1917 began. Though he had had limited participation in the Revolution itself, Shaumyan was elected President of the Baku Soviet due to his prior experience with the worker's movement in Azerbaijan. He also edited the newspapers Bakinsky Rabochy (Baku Worker), which came under pressure from the Provisional Government due to its somewhat provocative content. Following the October Revolution (which was centred in Petrograd and Moscow and thus had little effect on Azerbaijan) Shaumyan was made Commissar Extraordinary for the Caucasus and Chairman of the Baku Council of People's Commissars. Just following the Revolution, and just as British, American and other Western armies invaded Russia, in 1918, Baku Muslims rose up against their atheist Bolshevik leaders. Outnumbered, Shaumyan and 25 other commissars fled the city. They attempted to escape with Red Army troops by sea to Astrakhan, but the ships were captured on August 16 by the White Army. Shaumyan and the others were arrested and placed in Baku prison. On September 14, Red Army soldiers broke into the prison and freed Shaumyan. He and the other commissars boarded a ship to Krasnovodsk, where upon he was promptly arrested by British troops, and on the night of September 20, executed by firing squad.