Film

Mackintosh's first film appearance was in Prick Up Your Ears. He went on to star in Memphis Belle, Twelfth Night, and David Leland's Land Girls with Rachel Weisz and Anna Friel and co-starred with Rupert Graves in Different For Girls as a transgender woman. He played Winston in Guy Ritchie's film Lock, Stock and Two Smoking Barrels. His other notable films include Roger Michell's The Mother, The Jacket, Good with Viggo Mortensen, Underworld: Evolution and Underworld: Rise of the Lycans. He played Tony in Rupert Wyatt's feature The Escapist and Kertzer in Film 4's The Scouting Book For Boys. Mackintosh played Ivan Lewis in the big screen version of The Sweeney. 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.

Radio

He played Maj Sjöwall and Per Wahlöö's fictional police detective Martin Beck in the BBC Radio drama series The Martin Beck Killings.

Television

Mackintosh played a peasant boy, the Luck Child, who is prophecied to be king in Jim Henson's The Storyteller, S1:E4. Mackintosh played DS Winter in the 10 part series Lucky Man, created by Stan Lee for Carnival films and Sky TV. He played Robbo in From There to Here by BAFTA winning writer Peter Bowker for the BBC and played John Coniston in the acclaimed Inside Men for BBC 1. His other numerous credits include: Luther, Lost Christmas, The Other Boleyn Girl, The Buddha of Suburbia, Prime Suspect and Our Mutual Friend. Mackintosh won Best Actor at the Royal Television Society Awards and a Best Actor Nomination at the BAFTAs for his role in Care for the BBC. In recent years^[when?] he has become a popular choice to narrate documentaries.^{[citation needed]} He replaced Jamie Theakston to narrate the BBC police documentary, Traffic Cops. He also narrates on the documentary Aircrash Confidential from Discovery Communications and Saving Lives at Sea on BBC 2.

Film

Television