A judge has ordered the Nine Network to provide unedited footage of a witness "at the heart" of Susan Neill-Fraser's appeal against her murder conviction.
The Hobart grandmother is serving 23 years' behind bars for killing partner Bob Chappell on the couple's yacht in Hobart on Australia Day 2009
Neill-Fraser, 65, in March won the right to another appeal on the basis she has "fresh and compelling" evidence.
In Hobart's Supreme Court on Tuesday, Justice Helen Wood made an order for Nine to provide footage and a transcript of a 60 Minutes interview with witness Meaghan Vass.
In previously submitted court papers, Neill-Fraser's legal team argued there is evidence Ms Vass was on the Four Winds yacht the night of the murder.
Ms Vass was a homeless teenager at the time.
"Ms Vass lies at the heart of the appeal," Neill-Fraser's lawyer Chris Carr told the court.
"She will have to be heard in person. The court will make findings of her credibility."
Justice Wood ordered Nine to provide the footage and transcript before November 29.
The network also has the opportunity to object to the order but Mr Carr said a representative from Nine has said the station would comply.
A two-week block in early March was set aside for the appeal hearing.
The court heard the hearing could last as little as three days or up to two weeks.
Neill-Fraser's legal team also argues DNA evidence at her original 2010 trial was misleading, as was a winching reconstruction.