Hitchcock's version was very stagebound, and, except for the assault on Grace Kelly, practically a drawing room mystery. This one adds two more, including one seemingly necessary to create a closure.
Why does the movie go to the trouble of creating Detective Karamor (David Suchet), the archetypical intrepid investigator, then leave the necessary detective and confrontation work to Emily? His sole function seems to be to let Emily know about the missing key. Even his work with the phone records has holes in it - the police should have been able to trace the call to a cell phone and found some details. Knowing that the call came from an unregistered or falsely registered phone should have raised suspicion about the nature of the attack.
Why does the movie go to the trouble of creating Detective Karamor (David Suchet), the archetypical intrepid investigator, then leave the necessary detective and confrontation work to Emily? His sole function seems to be to let Emily know about the missing key. Even his work with the phone records has holes in it - the police should have been able to trace the call to a cell phone and found some details. Knowing that the call came from an unregistered or falsely registered phone should have raised suspicion about the nature of the attack.