The North Wales Film and Television Trail reached its halfway point with the unveiling of a plaque to mark The Life And Times of David Lloyd George.
Phillip Madoc unveils the latest film trail plaque
Actor Philip Madoc, who starred as the the statesman in the TV series 25 years ago, said his contribution to politics was "unappreciated".
The ceremony was held at the Lloyd George museum in Llanystumdwy near Criccieth in Gwynedd.
It is the 12th plaque on the trail of locations used in films and on TV.
Series director John Hefin said more should be made of locations in Wales.
Madoc met members of Lloyd George's family including his daughter Lady Olwen, whilst filming the nine episode drama in 1980.
Filming the series was a "joy" said Madoc
"I met her in costume and as I was introduced to her she said 'I watched you walking towards me and you are the spitting image of tada.'"
Following their first meeting, whenever Madoc was in north Wales he was invited to Lady Olwen's house for tea and described her as "a lovely lady".
The filming of The Life and Times was a "joy," Mr Madoc added, and he looked forward to going to work each day.
Hefin said a "great side-effect" of the TV series was that it had helped the Lloyd George museum.
He described Lloyd George as an "enigmatic" man whose most important contribution was that he gave a voice to the poor.
Speaking of Wales as a film and television location Mr Hefin said it should it should be pushed more, perhaps with tax breaks from the assembly government to encourage people in.
The first plaque was unveiled in 2004 and another 12 are planned.