The Impossible Murder ratings (Movie, 2010)

An old lady is killed in a locked room under impossible circumstances. Five witnesses hear her screaming while trying to break open the door to her room. When they enter, she is dead but there is no sign of the killer or the murder weapon. Why would someone kill an old lady in a remote village. And more importantly: How did he do it?

Fermat's Room
Total votes: 23,969
Average rating: 6.6 Enter Nowhere
Total votes: 15,127
Average rating: 6.4 The Killing Room
Total votes: 15,419
Average rating: 5.6 Accident
Total votes: 4,112
Average rating: 6.6 Midsummer's Equation
Total votes: 1,321
Average rating: 6.6 Abar Byomkesh
Total votes: 1,035
Average rating: 7.0 Corridor
Total votes: 1,219
Average rating: 5.9 Blind Revenge
Total votes: 1,212
Average rating: 5.4 Inju: The Beast in the Shadow
Total votes: 1,013
Average rating: 5.5 The Arrival of Wang
Total votes: 860
Average rating: 5.9