The Telegraph - David Gritten (3/5 stars): "Much of this material...is frankly uncinematic, and Cronenberg has compensated with sumptuous locations..." "But it's Knightley that one remembers, for a full-on portrayal that is gusty and potentially divisive in equal parts."
The Guardian - Xan Brooks (2/5 stars): "What the spanking [scene] can't do, unfortunately, is knock some life into this heartfelt, well-acted but curiously underwhelming slab of Masterpiece Theatre."
IndieWire - Oliver Lyttelton (B): "Still, if the take off and landing are a bit bumpy, most of A Dangerous Method is fearsomely smart..." "But if anything keeps it from quite hitting the heights that it could, it's Hampton's script."
London Evening Standard - Derek Malcolm (4/5 stars): "...[Knightley] more than holds her own from the moment she arrives on the scene..." "It is a dark, troubling tale...with a calm appreciation of the passions that lay behind the trio's different views of treatment..."
The Hollywood Reporter - Todd McCarthy (N/A): "Precise, lucid, and thrillingly disciplined...brought to vivid life by the outstanding lead performances of Keira Knightley, Viggo Mortensen, and Michael Fassbender."
Variety - Justin Chang (N/A): "...the film's most problematic element is Knightley, whose brave but unskilled depiction of hysteria at times leaves itself open to laughs."
Venice Verdict: It has a cool head, a compelling story, and features a trio of solid performances, but A Dangerous Method may be too cold and distant to consistently connect with audiences.