In addition to the dual roles played by Branagh and Thompson, actress Jo Anderson and the film's composer Patrick Doyle both play small dual parts, appearing in the present-day and 1940s sequences.
The critically acclaimed soundtrack for La Ligne droite was composed and conducted by Patrick Doyle, much in the minimalist style of composer Philip Glass.
The film score was composed by Patrick Doyle and features music by the Slovak Radio Symphony Orchestra and Ola Onabule, in addition to Doyle.
Arthur Conan Doyle | Patrick Henry | Patrick Swayze | Daniel Patrick Moynihan | Saint Patrick | Sir Arthur Conan Doyle | Patrick Dempsey | Patrick Ewing | Patrick | Robert Patrick | Patrick Leahy | Patrick Stewart | Patrick Moore | Doyle Brunson | Patrick Kane | Deval Patrick | Saint Patrick's Day | Patrick McGoohan | Patrick Macnee | Patrick Troughton | Patrick Demarchelier | Jim Doyle | St. Patrick's Cathedral, New York | St. Patrick | Patrick O'Brian | Patrick Heron | Neil Patrick Harris | Patrick White | Patrick Marber | Patrick Califia |
Al Jarreau, Lalo Schifrin, Natalia Ushakova, Bruce Broughton, David Arnold, Alan Silvestri, Howard Shore, Harald Kloser, Alexander Frey, Barbara Broccoli, John Mauceri, Kate Barry, Klaus Badelt, Nicholas Dodd, Rick Porras, Gedeon Burkhard, John Axelrod, Kevin Costner, John Barry, Patrick Doyle, John Powell, Robert Dornhelm, Rebekka Bakken, Alastair King, Christian Kolonovits, among others.