He's the most talked about man in Britain playing Superintendent Ted Hastings in Line of Duty, but many fans won't realise that Adrian Dunbar starred alongside Good Morning Britain's Susanna Reid in 80s drama The Price.
The Irish actor and the TV presenter worked together 36 years ago on the mini-series screened on Channel Four.
A throwback clip of Susanna, playing a young kidnap victim, and Adrian, playing a member of the IRA, in the drama set in Ireland was shown during an interview with the Line Of Duty star.
"It's lovely to see you after 36 years. I don't think either of us has changed," Susanna, 48, told him.
In the penultimate episode there was shock when Adrian’s popular character, who has worked to bring to justice criminals and corrupt cops, was charged with conspiracy to murder.
The nation is on the edge of their seats waiting to find out the identity of the corrupt high-ranking officer known as 'H', and fingers are being pointed at Hastings
The BBC's gripping drama, which has seen police anti-corruption unit AC-12 investigate a possible police collusion with hijackers of drugs transport, concludes on Sunday with a special 90 minute feature-length finale.
One of the reasons Hastings is the frame is his spelling of the word definitely as 'definately'.
Earlier in the series we saw 'H' type 'definately' in a message to the organised crime gang.
Asked how he spells definitely, Adrian joked: "I'm not answering that on the ground that it will incriminate me."
Line Of Duty fans wanting to know who H is might be in for a long wait
Line Of Duty: Six big questions that still need answers with one episode left
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