Detective Inspector Stephen McGrath, senior investigating officer from the Unresolved Homicide Investigation Team, appeared on the programme on Tuesday to talk about the disappearance of Marion Hodge in July 1984.
It comes a week after Police Scotland announced the team would be reinvestigating the death of the 34-year-old mum-of-two who lived at Balgray.
Also this week, officers launched an online portal to encourage members of the public to submit information that may help.
The Major Incident Public Portal (MIPP) is a website that gives the public access to a form so they can send information about the case directly to the team. Standard reporting methods, such as calling Crimestoppers anonymously or contacting police directly can still be used.
Marion is understood to have been dropped off at the Whitesands, Dumfries at about 7.30 am on Friday July 6 1984. She was reported to be carrying a blue canvas suitcase and brown handbag, wearing a cream high collared blouse, grey skirt and black sandals. She was described as five foot four tall, of slim build with dark brown, collar length hair.
Three days later she was reported missing to Dumfries and Galloway Constabulary and in 1992 the Court of Session declared her legally dead. However, her body has never been found.
DI McGrath said: “The response to our appeal so far has been positive but we are continuing to ask the public to contact us if they have any information that might help. Marion’s friends and family deserve closure.
“We’re appealing to anyone who remembers anything unusual leading up to Marion’s disappearance, any sightings in the Whitesands area or any other relevant information that might help our inquiry.”
The online form can be found at https://mipp.police.uk/operation/96HO020308D09-PO1, or to contact the dedicated inquiry team call 0141 305 4551.