He played Tony in Rupert Wyatt's feature The Escapist and Kertzer in Film 4's The Scouting Book For Boys.
He played Jack in Set Fire to the Stars with Elijah Wood and worked with Michael Caton Jones for the second time on his film Urban Hymn.
Mackintosh played DS Winter in the 10 part series Lucky Man, created by Stan Lee for Carnival films and Sky TV.
His other numerous credits include: Luther, Lost Christmas, The Other Boleyn Girl, The Buddha of Suburbia, Prime Suspect and Our Mutual Friend.
[citation needed] He replaced Jamie Theakston to narrate the BBC police documentary, Traffic Cops.