Darren Carver-Balsiger’s review published on Letterboxd:
The Creeping Flesh feels very Hammer Horror, even though it technically isn't. Peter Cushing has a lot of energy and it's possibly one of his best performances. The visuals are also occasionally creative and the effects are okay. The pulpy dialogue and dodgy science is laughable, but in a good and entertaining way. Unfortunately The Creeping Flesh has a plot which is a complete mess. So many subplots are pointless and there's an unnecessary attempted rape scene. The Creeping Flesh has things to commend but it's half baked and sadly let down by its script.