Night Must Fall is a 1957 British television play which adapts Emlyn Williams play Night Must Fall. It aired as an episode of Hour of Mystery. It was a key television role in the career of Ronald Lewis.
The play was originally going to be broadcast over two nights but then it was decided to film it over one night. This made it the first live play to run on independent television for more than an hour.
The Leicester Mercury said Lewis "was excellent." The Sunday Mercury felt Lewis "made a brilliant success."