The 65-year-old will return to screens in an ITV3 documentary about camp comedy legend Larry Grayson.
Barrymore was a warm up act for Grayson on The Generation Game.
The Strike It Lucky front man was axed by ITV in 2002 after the tragic death of Stuart Lubbock in the swimming pool of the star's Essex home.
Barrymore was quizzed on suspicion of Lubbock's rape and murder, but last year won damages from the High Court over wrongful arrest.
He returns to the screen to discuss his former mentor on Larry Grayson: Shut That Door.
Grayson hosted The Generation Game from 1978, replacing Bruce Forsyth.
Barrymore tells the show: “He had an amazing career out of just being Larry Grayson. He was unique.”
He adds: “I was warm-up man for him. He fumbled his way through the programme, you were never sure he was going to get through to the end of the show in one piece. But he always did.”
Michael denies that Grayson's campness was an act, adding: “I remember talking to some old girls and I told them he was gay and they didn’t believe me."
Last month we reported a bid for a new inquest into the death of Stuart Lubbock in 2001 at TV star Michael Barrymore’s home has been blocked.
Attorney General Jeremy Wright turned down an application by Stuart’s dad Terry to go to the High Court.