A TELL-all interview with former Peter Slipper staffer James Ashby is set to "rock the Abbott Government", according to teasers released by Channel Nine's 60 Minutes.
Mr Ashby hit the headlines after Mr Slipper abandoned his long-time loyalty to the Coalition to become Speaker in the House of Representatives, aligning himself with Labor.
In the 60 Minutes promo, a voiceover describes "new sexual harassment claims" as "the whistleblower reveals all".
The clip flashes up images of Peter Slipper's nemesis and Sunshine Coast MP Mal Brough, Education Minister Christopher Pyne, Longman MP Wyatt Roy and Prime Minister Tony Abbott.
In the clip, journalist Liz Hayes says to Mr Ashby, "This is dynamite. Do you agree?"
"Yes," he replies.
The interview will be the latest in an exhaustive saga that has now spanned two governments.
After leaving his employ, Mr Ashby accused Mr Slipper of sexual harassment.
He made the allegations through national media and later through a court case launched in April 2012.
Documents supplied to the Federal Court also revealed a string of lewd and bizarre text messages between the pair.
Mr Ashby took Mr Slipper to court alleged sexual harassment and breach of contract.
He dropped the case earlier this year, citing Mr Slipper's mental illness and exorbitant court costs.
Mr Slipper's legal fees have been footed by the taxpayer.
"This has been an intense and emotionally draining time for me and my family, taking its toll on us all," Mr Ashby said in a statement at the time.
"One of the key reasons I started this action was to stop Peter Slipper's behaviour. I am confident this has been achieved."
In June, Mr Ashby began court proceedings against the Commonwealth to have his court costs paid.
Mr Slipper was facing court, accused of misusing $1000 in Cabcharge vouchers so he could tour Canberra's wine regions.
He was found guilty and is to be sentenced later this month.
The 60 Minutes report airs at 8pm on Sunday.