Darren Carver-Balsiger’s review published on Letterboxd:
Green for Danger is a tad dull at first, with too many characters with too few interesting features. There's a few horror moments that up the ante though, with evocative shadows, violent murder, and tense surgery. Alastair Sim turns up midway through Green for Danger and saves the film, playing a witty detective who is both hilarious and likeable. The plot is all a bit silly but with Sim around the film is fine fun.