Newstalk is launching an appeal for information on the anniversary of the death of Charles Self.
The Scottish man was just 32 when he was murdered in Monkstown, Dublin on January 21st 1982 - 41 years ago.
He was found dead at the foot of the stairs in his home, having been stabbed 14 times.
This appeal follows the success of the second series of Inside The Crime podcast, presented by Newstalk Courts Correspondent Frank Greaney.
It looked into the Charles Self murder, which remains unsolved.
“What happened to Charles Self was truly horrific," Frank said.
"The fact that it remains an unsolved murder makes it even more tragic.
"Charles’ story was crying out to be told and it was an honour to tell it. But it would be amazing if we could help solve this case and bring Charles’ killer to justice".
"We're convinced that somebody out there knows something, and so to mark the 41st anniversary of Charles Self’s murder, we're appealing to anyone with information to come forward - particularly the mystery man in the taxi who went home with Charles that night," Frank said.
"This man wore a neat two-piece suit, was maybe 25-years-old with floppy fair hair.
"He’d be in his 60s now and while he was initially treated as a potential suspect back in 1982, it's now thought he may have witnessed what happened to Charles and fled.
"It’s never too late to do the right thing," he added.
Charles came to Ireland from Glasgow in the 1970s and was headhunted to RTÉ for their set design department.
He was well liked and spoke with a distinctive Scottish accent, becoming a familiar face around Dublin's gay-friendly bars.
Through interviews with Charles’ friends and colleagues, as well as An Garda Síochána's Cold Case team, Frank delved into the sequence of events on the night of his death, and the wide-reaching consequences within the gay community in Dublin.
Anyone with information is asked to contact email@example.com or the Garda Confidential Line on 1800-666-111.