Miles Hardman’s review published on Letterboxd:
There's a joke here about having to live through the mistake that is K-PAX over and over, forever. In truth, it's not that bad. Kevin Spacey plays Kevin Spacey (and then some), but Jeff Bridges is one of the few stars of the show alongside composer Edward Shearmur who does a solid job with the score. The problem is that the film is hugely imposing yet never literate enough to justify the stringency of its various messages. And it's nowhere near as good as its two close relatives: One Flew Over The Cuckoo's Nest and Under The Skin (or The Man Who Fell To Earth).