MSFinals-5492

A 50-year-old man has been admitted to a psychiatric ward for a fourth time. He is withdrawn, irritable, restless and afraid. He says that he has been depressed for about 8 weeks. He has insomnia, loss of appetite and weight loss. He also has suicidal ideation with a plan to overdose on medicine, which he has done in the past under the influence of commanding auditory hallucinations. He hears voices often even when he is not depressed, but they only talk of suicide when he is depressed. He was divorced 5 years ago and has trouble holding jobs due to his paranoia and odd behaviour.
What is the most likely diagnosis?