Alleged Bourke Street killer Dimitrious "Jimmy" Gargasoulas has told a court the Illuminati were to blame for the fatal attack, claimed he was privy to the secrets of the Freemasons and insisted that the government was controlling his life.

Mr Gargasoulas, who allegedly killed six people, including two children, on January 20 by driving a car at pedestrians, appeared in the Melbourne Magistrates Court on Friday via video link.

Alleged Bourke Street killer Dimitrious "Jimmy" Gargasoulas

He interrupted his lawyer's discussion about future court hearings, saying: "Your honour, I was under extreme stress which caused me to have a mental breakdown".

In a short stream of consciousness, Mr Gargasoulas also said he held the "key to Freemasons treasure" and declared "It's not fair that my life is being controlled by the government".