Detectives have just 48 hours to find a murder witness willing to talk before the thugs responsible can frighten neighbourhood residents into keeping quiet; and police discover a man who's been shot and brutally beaten, but with no physical evidence they've got their work cut out for them.

In medicine, it's 'The Critical Hour', to cops it's 'The First 48 Hours'. Find out if our detectives are right as they try to solve their crimes during the initial and critical first 48 hours.