In 1986, Flynn appeared in the
LWT television film ''
London's Burning as firefighter Kenny "Rambo" Baines. When the film spawned a series of the same name in 1988, he was unable to reprise his role due to previous commitments. Also in 1986, he played a minor role as the soldier "Franny" in "The Monocled Mutineer". In 1988 he played the character Freddie in the ITV drama The Fear, After Flynn and Green performed Unchained Melody'' on the programme,
ITV was inundated by people looking to buy the song, and the pair were persuaded by record producer
Simon Cowell to record it and release it as a single, a double A-side with
White Cliffs of Dover. In 1997, he starred as Eddie Wallis, alongside singing partner
Robson Green, in the comedy-drama ''
Ain't Misbehavin''. In 2007, Flynn having semi-retired from acting and moved to
Pembrokeshire, He continued the role for nine years until 2019. Flynn provides the voice of Daniel (the hound) in the children's television show
Tommy Zoom. In 2012, Flynn stars alongside
Matthew Macfadyen in four series of
Ripper Street for the BBC. In 2016, Flynn appeared in "
Shut Up and Dance", an episode of the
anthology series Black Mirror. In 2017, he was the voice of Dr. Gachet in the film
Loving Vincent. In 2021, Flynn portrayed Neil Wallis specialist in crisis management in the BBC1 television drama film
The Trick, == Personal life ==