Twenty-five million of us live in houses that do not belong to us, pay a landlord, obey his rules. Council flats, private houses, rooms for rent: a headache for local government, new legislation for Parliament. Misery for some tenants. Crooked profits for some landlords. In a four-part enquiry Man Alive looks each month at the world of the landlord, the tenant, the area where they confront each other, and the alternative - buying a home of your own.