Sim applies the pressure when James Tennant fails to supply a convincing account of the unaccounted minutes in his timeline. When a phone call comes through to the incident room supposedly made by Amy, CID track the call to nearby Sherbourne Park and find a young boy who has been robbed and attacked. When they discover the boy is the best friend of Amy's step-brother, Todd, Manson discovers that the phone used to make the call belonged to the boy and that his sister was the person faking Amy's voice. Meanwhile, a witness comes forward claiming to have proof of James Tennant's violent behaviour, but Hemmingway's failure to take her seriously results in disaster.