Duggan is the son of Irish immigrants. His mother works as a cook while his father is a school secretary. He was educated at Douai School, Woolhampton, Berkshire. He studies experimental psychology for two years at the University of Edinburgh but leaves school feeling unsatisfied and decides to try his hand at acting. Prior to making it as an actor, he sells bone china to U.S. soldiers stationed in Germany.
Duggan makes his television debut in 1976 in an episode of The Flight of the Heron, followed by single episodes of Sutherland’s Law and The New Avengers (1976) and ITV‘s Playhouse (1977). He then appears in an adaptation of The Eagle of the Ninth, and his first film is Sweeney 2 in the following year. In 1979 he begins a nine-year stint as Detective Sergeant Albert “Cheerful Charlie” Chisholm in the popular TV series Minder.
McKenna makes his film debut in the IRA–Nazi drama The Night Fighters (1960) and from this uncredited beginning he moves up to tenth billing in The Siege of Sidney Street (1960). His next major movie is Girl with Green Eyes (1964), by which time he has also started a successful television career, making his TV debut in Espionage (1963) and over the next few years appears in several more TV shows. His versatility enables him to play three characters in The Avengers (1961). He is also featured in such well-regarded shows as Adam Adamant Lives! (1966), Dixon of Dock Green (1955) and The Saint (1962).
McKenna dies on February 13, 2011 at the Royal Free Hospital in Hampstead, London, at the age of 81 following a long period of illness. He is buried alongside his wife at Teampall Cheallaigh Cemetery in his native County Cavan.
Following his death, tributes are paid by President of IrelandMary McAleese, Prince Charles, and Ireland’s Minister for Tourism, Culture and SportMary Hanafin, who says that McKenna was “one of a great generation whose talents on the screen and stage both at home and abroad gave us all great pride in his accomplishments.” In County Cavan, he is commemorated by the T. P. McKenna Drama Scholarships (VEC) and the T. P. McKenna Perpetual Trophy presented as part of the Millrace Annual Drama Festival.
Actors from every genre of stage and screen show come together in the chapel at Terenure College in Dublin on February 4, 2000 for the funeral of Irish television and film actor Tony Doyle.
Brian Quigley, Doyle’s Ballykissangel character, is written out of the show after Doyle’s death in the first episode of the final series where Quigley fakes his own suicide and flees to Brazil.
The Tony Doyle Bursary for New Writing is launched by the BBC following his death. Judges include his friend and Ballykissangel co-star Lorcan Cranitch. Cranitch subsequently stars in the BBC detective series McCready and Daughter, which had been written with Doyle in mind.