Morning Call U.S. title The Strange Case of Dr. Manning is a 1957 British thriller film, directed by Arthur Crabtree and starring Greta Gynt and Ron Randell.
Manning is found dead, and the police decide to use Annette as bait to catch his killer. They publicise that she has heard his voice in the phone calls and will be able to identify it if she hears it again, hoping that the threat will flush him out in order to try to get her out of the way. Logan now begins to work together with the police, and they finally succeed in cornering the killer, who reveals a surprising motive for his actions.The film was originally cast with George Raft and Bella Darvi as the leads, but Raft reportedly pulled out, citing dissatisfaction with the script. The producers claimed that Raft was insistent on his character having a romantic involvement with the leading lady, which they could not accept as they felt it would unbalance the plot and be seen as incongruous by audiences. For undisclosed reasons, they also decided to let Darvi go. ........
Source: Wikipedia