He has composed or co-composed scores for a wide range of films and television, including The Boondock Saints (1999), Resident Evil: Apocalypse (2004), Silent Hill (2006), The Imaginarium of Doctor Parnassus (2009), The Good Dinosaur (2015), Storks (2016), The Breadwinner (2017), The Addams Family (2019), Onward (2020), Guillermo Del Toro’s Tales of Arcadia (2019-2021), Nora Twomey’s My Father’s Dragon (2022) and Julia (2022).

[2] After cutting his teeth on independent Canadian features, Danna moved to Los Angeles to begin his work in television, landing jobs on the CBS crime show Sweating Bullets, Beverly Hills 90210, and the Warner Brothers' legacy title, Kung Fu: The Legend Continues.

This was followed by the cult classic The Boondock Saints, which featured choral and orchestral elements mixed with electronica, along with "The Blood Of Cu Chulainn", a Danna brothers' offering from their album, A Celtic Romance.

Danna took the opportunity of the Shakespeare connection to employ a vielle and a viola da gamba in combination with dark orchestral colors, his first of many uses of early music instruments in his scores.

Nelson's desire for an onerous death camp atmosphere meant that there would be no score in the film until the final credits, where Danna composed a dissonant and powerful dirge, merging a small chamber group with Klezmer soloists, using an approach akin to modes of limited transposition to evoke both a terrible beauty and desolation.

[5] 2001 brought forth the first of many collaborations with acclaimed filmmaker Brett Morgen on The Kid Stays in the Picture, a celebrated retelling of producer Robert Evans' book of the same title.

Resident Evil: Apocalypse followed in 2004, earning Danna four SOCAN Awards for International Film Music, and then a reunion with brother Mychael on Terry Gilliam’s Tideland, their first time working together since their Celtic albums, seven years prior.

2006 and 2007 found Danna in Toronto, scoring the movie adaptation of the hit video game franchise Silent Hill for director Christophe Gans.