If you're looking for a hard facts or a psychologically insightful bio of the great Houdini, then Death Defying Acts will disappoint. DDA is more a tea cake of a film, selecting odds and ends of facts from the life of the master illusionist and mixing them into a sweet, "what-if" confection.
Houdini did, in fact, mount an active campaign to debunk spiritualists and the Mary McGarvie of this film may have been suggested by a real life American psychic, "Margery" - one of Houdini's prime targets. Hardly the struggling single mother of this film, Margery Crandon was the popular wife of a Boston physician. DDA is full of similar juxtapositions of fact with fantasy that make for a gently told story which I found pleasant to watch, but neither gripping, nor illuminating.
Within the context of the script, the principal actors are excellent, but as I write this I can't help imagining what it would be like to see Pearce, Jones, Ronan and Spall in a "real-life" version of the Houdini story. One that probed the core of a man desperate for recognition, redemption, and resurrection. All four of these actors certainly have the juice for a film with that kind of edge!
Technically, DDA is uneven. In some instances the selection of locations and dressing of the sets is an early 20th Century enthusiasts dream. In others, the sets looked rather economically built. Beautifully filmed and edited crowd scenes are interspersed with some truly dull tracking shots and unimaginative cutting.
All that said... I enjoyed the film for what it was - a fantasy - and I'll watch it again. Probably several more times. So, if you're in need of an escape or a sweet taste of the guilty pleasure variety, this film fits that category perfectly!