by Wilfred Greatorex.
A round-the-clock vigil is kept on Britain's ports and airfields by the men of H.M. Immigration Service.
A series of six dramatised documentaries

On a German liner at night in the Solent passengers wait to disembark. Among them is thought to be an undesirable alien. Southampton Immigration Officer Jim Howarth's job is to unmask him. But this is not his only problem...
From the Midlands