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From 1975–2012, he appeared in many English language US and UK television and film productions. One of his early roles was Kaiser Wilhelm II in Michael York's adventure film The Riddle of the Sands. One of his most well-known roles was that of Herman Dietrich in Raiders of the Lost Ark.
His voice also appeared in video games including as Kaiser Vlad in Battalion Wars. Kahler played the Prince of Tübingen in Stanley Kubrick's 1975 film, Barry Lyndon. In 2001 he portrayed a Wehrmacht General in the World War II TV miniseries, Band of Brothers. In the 1982 Clint Eastwood spy thriller Firefox, he played KGB chairman Yuri Andropov. In 2011 Kahler appeared as Dr. Hoffmanstahl in Sherlock Holmes: A Game of Shadows. In 2017 he appeared as a German Commander in the Warner Bros./DCEU film Wonder Woman.
- 1975 Barry Lyndon as Prince of Tübingen
- 1976 The Eagle Has Landed as SS Hauptsturmführer Fleischer (uncredited)
- 1977 March or Die as First German
- 1978 Force 10 from Navarone as German Soldier At Supply Dump
- 1978 The Boys from Brazil as Schwimmer
- 1979 The Riddle of the Sands as Kaiser Wilhelm II
- 1979 The Lady Vanishes as Helmut von Reider
- 1980 Rough Cut as De Gooyer
- 1980 The Sea Wolves as Trompeta
- 1981 At the Fountainhead as Wolfgang Leonhard
- 1981 Raiders of the Lost Ark as Colonel Hermann Dietrich
- 1981 Priest of Love as German Officer
- 1982 Firefox as KGB Chairman Andropov
- 1982 Remembrance as Dutch Matelot
- 1983 High Road to China as Von Hess
- 1983 Ascendancy as Muller
- 1983 The Keep as SS Adjutant
- 1985 A Zed & Two Noughts as Felipe Arc-en-Ciel
- 1988 The Bourne Identity as Gold Glasses
- 1992 Shining Through as Border Commandant
- 1993 The Remains of the Day as German Ambassador
- 1994 Backbeat as Bert Kaempfert
- 1996 Loch Ness as Dr. Muller
- 1997 Firelight as Sussman
- 2000 Britannic as Captain Kruger
- 2001 The Lost Battalion as General Von Sybel
- 2001 Charlotte Gray as Oberleutenant Lindermann
- 2004 Bridget Jones: The Edge of Reason as Commentator
- 2010 Shanghai as German Consul
- 2011 Sherlock Holmes: A Game of Shadows as Dr. Hoffmanstahl
- 2012 Full Firearms as Adam
- 2012 Cockneys vs Zombies as Nazi Officer
- 2017 Wonder Woman as German Commander
- 2008 Haber as Erich Ludendorff
- 2010 Stasi Dog as The Narrator
- 2012 Cold Warrior as Bochinsky
- 2016 Millefeuille as Hans-Peter (Opa)
- 2016 Rubicon as Dirk Van de Cleef
- 2020 Cognition as Dr. Zoger
- 1980 Don Siegel: Last of the Independents as Himself
- 1980 The Sandbaggers as Lincke
- 1982 The Secret Adversary as The German
- 1982 Hess as Rudolf Hess
- 1984 The Adventures of Sherlock Holmes as King of Bohemia
- 1985 Space as Funkhauser
- 1985 The Dirty Dozen: Next Mission as General Sepp Dietrich
- 1987 The Dirty Dozen: The Deadly Mission as Colonel Krieger
- 1987 A Perfect Spy as Lieutenant Dollendorf
- 1988 War and Remembrance as SS Major Anton Burger
- 1992 The Young Indiana Jones Chronicles as German Second At Duel
- 1993 Soldier Soldier as Dr. Heller
- 1999 Kavanagh QC as Dieter Klausen
- 2000 Dalziel and Pascoe as Jurgen Falke
- 2001 Band of Brothers as German General
- 2001 Red Cap as General Joachim Ulmke
- 2004 London as German Traveller
- 2005 The Girl in the Café (TV) as Herr Gerhardt
- 2006 The Somme - From Defeat to Victory as General Hans von Plessen
- 2008 George Gently – Bomber's Moon as Gunter Schmeikel
- 2014 Fleming: The Man Who Would Be Bond as Admiral Brandel
- 2019 BBC Look North (Yorkshire and North Midlands) as Himself
- 1998 Metal Gear Solid as Donald Anderson / Revolver Ocelot / Jim Houseman (German dub)
- 1999 Syphon Filter as Thomas Markinson (German dub)
- 2003 Tomb Raider: The Angel of Darkness as Grant Muller
- 2004 Half-Life 2 as Dr. Wallace Breen (German dub)
- 2005 Battalion Wars as Kaiser Vlad
- 2007 Battalion Wars 2 as Kaiser Vlad / Lord Ferrok
- 2008 The Club as Enemy Characters
- 2009 IL-2 Sturmovik: Birds of Prey as German Voice
- 2010 Kirby's Epic Yarn as The Narrator (German Version)
- 2011 Crysis 2 as Karl Ernst Rasch (German & English dub)
- 2013 Crysis 3 as Karl Ernst Rasch (German & English dub)
- 2013 Company of Heroes 2 as German Announcer
- 2015 Calvino Noir as Arno
- 2017 Raid: World War II as Dr. Maximillion Reihnhart
- 2018 Call of Cthulhu: The Official Video Game as Thomas Fuller
- 2019 Close to the Sun as Aubrey King
- 2012 Raiding the Lost Ark: A Filmumentary (special thanks)
The Scarlet Pimpernel of the Vatican was first broadcast in 2006 on BBC Radio4. He played Herbert Kappler. This was a drama by Robin Glendinning: a Nazi war criminal is befriended by a Vatican priest in his cell, based on the real-life adventures of Monsignor Hugh O'Flaherty.
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- "Barry Lyndon (1975) – Stanley Kubrick – Cast and Crew – AllMovie". AllMovie.
- "Wolf Kahler". www.aveleyman.com.
- "Wolf Kahler – TV Guide". TVGuide.com.
- Fraser, C. Gerald (7 March 1982). "Television Week". The New York Times.
- "The Scarlet Pimpernel of the Vatican". Imperial War Museums.
- "Afternoon May: The Scarlet Pimpernel of the Vatican – BBC Radio 4 FM – 30 November 2006 – BBC Genome". genome.ch.bbc.co.uk.