Adam Mast reviewed Knock Knock for The SU Independent. A few quotes:
As loving father and husband Evan Webber, Reeves proves to be quite effective in the earlier portions of “Knock Knock”. He’s charming and the sweet moments between he and his kids are kind of adorable.
Once the shit storm hits though, the “Bill and Ted” star struggles to convince us that he’s a man in any sort of real peril, although I must admit, a scene in which he angrily delivers an obscenity filled rant works splendidly.
In the end, Roth has exposed us yet again to his own brand of frat boy inspired horror. Clearly, his message here is “Just say no.” I only wish that “Knock Knock” as a whole was as provocative and as frightening as it could have been.