Parts of Underbelly's fifth season were filmed in Parramatta central business district this week.
Production staff working on the series were seen filming mostly inside the parish hall of St John's Cathedral, Parramatta about 3pm on Thursday.
Scenes for the next Underbelly TV series instalment, Underbelly: Badness were also filmed in Auburn earlier this month.
A spokesman for production company UBB Pty Ltd said will be set in the current time and based on the hunt for one of Australia's most vicious crooks.
The central figure of the show is a man that would never have been caught were it not for a detective who just wouldn't quit.
Previous scenes had been shot on location in Auburn on North Street, near the T-junction of Edgar Street and on Rickard Street, between North Street and Cumberland Road.
In marked contrast to Underbelly: Razor, which was set in the 1920s, the latest Nine Network mini-series is the most contemporary yet.
Set from 2001-2011, Underbelly: Badness tells the story of feared underworld figure Anthony Perish and the quest by a dedicated NSW team of police to bring him and his associates to justice.
Perish managed to maintain an almost non-existent public profile, which was only revealed when his connection to the murder of Terry Falconer, a former inmate from Silverwater jail, brought him to the attention of Strike Force Tuno, which was formed to find Falconer's killers.
Strike Force Tuno, led by Detective Inspector Gary Jubelin, spent 10 years gathering the evidence that would finally see Perish brought to justice.
Jonathan LaPaglia, younger brother of well-known actor Anthony, has been cast as Perish and Matt Nable as Jubelin. The series will also star Aaron Jeffery and Jodi Gordon.
"Underbelly: Badness is a riveting and compelling story of a modern underworld figure that merged into the fabric of our community completely under the radar, and we are very proud to shine a light on this story and bring it to Australian audiences," said Nine's drama executive Jo Rooney.
The eight-part mini-series is being directed by Tony Tiles, David Caesar and Ian Watson.
The first ever Underbelly series went to air in 2008 and was based on the real-life events surrounding the Melbourne gangland killings between 1995 and 2004.