Iranian-born, self-styled cleric Man Haron Monis, 50, held 17 people hostage at the Lindt chocolate cafe in the heart of the city's financial district on the morning of December 15 before being killed when police stormed the building in the early hours of the next day.
In emotional interviews, some of the surviving hostages told Channels Seven and Nine of how Monis forced them to call emergency services to tell them his demands, and how the gunman became more frustrated as night fell.
"You lose hope, thinking about your family outside, thinking there's nothing you can do to get yourself out and it's very hard," said the 30-year-old, who was pregnant at the time of the hostage crisis.
The siege horrified Australia and prompted a mass outpouring of grief that saw thousands of flowers laid near the cafe in the city's Martin Place.
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Survivor John O'Brien, 82, said Monis was "ranting and raving" about Prime Minister Tony Abbott and threatened to kill everyone in the cafe.
The interviews, for which channels Seven and Nine reportedly paid hundreds of thousands of dollars, came just over a week after an inquest opened into the siege.
Cafe manager Tori Johnson, 34, and barrister and mother-of-three Katrina Dawson, 38, were killed during the standoff, and the New South Wales coroner had been told in graphic detail how Johnson was made to kneel down and shot in the back of the head after a group of hostages escaped.
Hostage Marcia Mikhael said Monis, who had a history of violence and extremism, told her he had a "plan" to die in the standoff. A separate report into the siege commissioned by the federal and NSW state governments has been completed and is expected to be published this month.