Història basada en fets reals i ambientada a les ciutats de Zuric i Viena durant les setmanes prèvies a la Primera Guerra Mundial. Un psiquiatra emergent anomenat Carl Jung (Michael Fassbender) comença una relació a tres bandes amb el seu professor, el gran Sigmund Freud (Viggo Mortensen), i amb una dona tan guapa com inquietant: Sabina Spielrein (Keira Knightley). Junts exploraran els límits de l'ambició amb un rerefons intel·lectual i sexual. I tot explotarà quan el trio accepti un nou integrant: el llibertí sense escrúpols Otto Gross (Vincent Cassel).
Guió: Christopher Hampton
Libro 'Un método peligroso': John Kerr
Obra 'The Talking Cure': Christopher Hampton
Producció associada: Tiana Alexandra, Richard Mansell
Coproducció: Martin Katz, Marco Mehlitz
Producció executiva: Stephan Mallmann, Karl Spoerri, Thomas Sterchi, Peter Watson, Matthias Zimmermann
Producció: Jeremy Thomas
Música: Howard Shore
Fotografia: Peter Suschitzky
Muntatge: Ronald Sanders
Càsting: Deirdre Bowen
Disseny de producció: James McAteer
Direcció artística: Anja Fromm, Nina Hirschberg, Frances Soeder, Sebastian Soukup
Vestuari: Denise Cronenberg
Maquillatge: Manuela Antritter, Andrea Braun, Stephan Dupuis, Ulrike Gass-Flakowski, Gesa Gerersdorfer, Adriane Graeff, Andrea Hecking, Nadia Homri, Carla Hovenbitzer, Elisabeth Kaukal, Barbara Kichi, Isabella Koppensteiner, Erwin H. Kupitz, Mary Liebsch, Silka Lisku, Martina Mariacher, Magret Payer, Ulrich Ritter, Katrin Silbernagel, Conny Ulatowski, Romy Voigtsberger, Sonja Wimmer, Gerhard A. Zeiss
Departament artístic: Hinnerk Ahrens, Sabine Auenhaus, Markus Baum, Christian Beiseel, Uwe Belke, Klaus Bienen, Uwe Brauer, Mieke Casal, Lars Dicht, Stefan Dörsch, Ralf Eggebrett, Birgit Esser, Marlene Foltyn, Jutta Freyer, Sven Fuchs, Pierre Galic, Franz Gebetsreiter, Marcus Günther, Kalle Hahnel, Flo Hanatschek, Jakob Hauck, Michael Heck, Michael Hochwarter, Wolfgang Hoffman, Horst Hruska, Stefan Isfort, Nora Jaenicke, Sebastian Karbowiak, Andrea Kessler, Thorsten Klein, Andrea Knopp, Georg Kuhn, Itsuko Kurono, Heike Küpper, Hendrik Labuhn, Carolin Langenbahn, Uli Langenberg, Anuchai Wolfgang Dodo Lilienthal, Michael Lindhammer, Michael Madden, Sebastian Maier, Gabi Mocair, Inga Molsberger, Jan Molsberger, Joachim Monninger, Felix Montero, Vincent Müller, Frauke Nelißen, Nanna Neudeck, Julia Neumann, Yolanda Palazuelo, Andreas Palka, Daniel Peeck, Gerhild Perl, Max Pfeffer, Irene Piel, Doriano Quintavalle, Achim Reimann, Nele-Tebea Reineke, Jan Rott, Claus Rusicke, Dieter Schmidt, Lara Schmidt, Georg Schneider, Axel Scholz, Georg Seibenbacher, Carol Spier, Sybille Spindler, Edda Staubach, Heike Steen, Richard Steinberg, Ursula Strobler-doszko, Ruben Thöndel, Katja Trambow, Stephan van Geldern, Ulrike Veit, Saskia von Klitzing, Verena Wagner, Andreas Walter, Dirk Wargala, Christian Weber, Michael Wirth, Petra Maria Wirth, Michi Wischnewski
So: Ed Ballard, Rob Bertola, Finlay Braithwaite, Christian T. Cooke, Tony Currie, Jenna Dalla Riva, Nick Foley, Peter Gleaves, Jamie Gould, Alastair Gray, Wayne Griffin, Jack Heeren, Michal Holubec, Goro Koyama, Andy Malcolm, Stephen Muir, Michael O'Farrell, Michael Paterson, Brandon Prodger, Roman Rigo, Steve F.B. Smith, Andy Stallabrass, Reinhard Stergar, Orest Sushko, Bennet Switala, Don White, Mark Zsifkovits, Gren-Erich Zwicker
Efectes especials: Norman Ernst, Rolf Hanke, Andreas Herberg, Jens Schmiedel, Roland Weder
Efectes visuals: Peter Armstrong, Sarah Barber, Dennis Berardi, Mathew Borrett, Mike Borrett, Wayne Briton, Joerg Bruemmer, Wilson Cameron, Robert Caputi, Dan Carnegie, Andy Chan, Joseph Cheng Chen, Ovidiu Cinazan, Nick Colangelo, Chris De Souza, Julio Del Hierro, Michael DiCarlo, Jeremy Dineen, Anand Dorairaj, Kevin Downer, Maxime Ducharme, Vladimir Durdevic, Peter Dydo, Jason Edwardh, Can Etiskol, Rory Falloon, David Fix, Pietro Gallo, Oliver Hearsey, Jean-Francois Houde, Lee Hughes, Farrukh Khan, Mike Kwan, Isabelle Langlois, Ethan Lee, Derick Loo, Mickaël Léger, Tom Mayclim, Jon McCallum, Ken McCuen, Tracey McLean, Sarah McMurdo, Christian Morin, Rolf Muetze, Prasenjit Mukherjee, Prasenjit Mukherjee, Dave Muscat, Tom Nagy, Chris Nguyen, Kelly Noordermeer, Vincent Papaix, Nick Paulozza, Diana Pazzano, Matthew Pellar, Trevor Pickard, Sebastien Proulx, Matt Ralph, Dominic Remane, Pierre-Luc Rioux, Linda Rose, Chris Ross, Milan Schere, Matt Schofield, Jerry Seguin, Gavin Soares, Frankie Stellato, Jim Su, Laetitia Séguin, Chris Wallace, Aaron Weintraub, Wojciech Zielinski
Animació: Hanung Lee
Càsting: Iris Baumüller-Michel, Edith Fux, Harry Reich, Christopher Richards, Marc Schötteldreier, Florian Wotruba
Vestuari: Hanya Barakat, Kathryn Blight, Charlotte Child, Nigel Egerton, Petra Fassbender, Rosemarie Grant, Rosie Grant, Harriet Kendall, Jean-Ding Lee, Tung-Ying Liu, Eva Maas, Elisabeth Nagel, Paulina Polom, Evelyn Thell, Thomas Zaepf, Heike Ziegler
Departament editorial: Sandy Pereira, Emma Sanders
Departament musical: Amy Baer, Joris Bartsch Buhle, Jennifer L. Dunnington, Vic Fraser, Nikolaus Resa, Simon Rhodes, Tom Russbueldt, Howard Shore, Tim Starnes
Departament de transports: Acki Allizar, Heiko Daugau, Ingo Fenner, Laurentius Girardoni, Hanna Herzig, André Hindel, Paul Hodges, René Keil, Marcus Koszczol, Joerg Kraft, Lars Kraus, Daniel M.J. Krause, Ilja Kruk, Cain Lee, Peter Martin, Daniel Schmidt, Steffen Schmidt, Paul Schober, Tim Schoenefeld, Philipp Völker, Philip Wachmann, Piotr Walczak, Alexander Wunderling
Agraïments: Julia Arika, Christina Bentlage, Christine Berg, Teresa Hoefert de Turégano, Peter Dinges, Selina Gartler, Sara Giles, Constanze Hellmich, Martina Horbach, Gabriele Röthemeyer, Claudia Sauer, Jenna Seguin, Christiane Sommer, Katrin Stolpe, Peter Sussman, Brigitte Veronese, Viviana Vezzani, Oliver Zeller