Mary plans to start a revolution in the world of estate agents. Buying a house is the most important purchase of our lives, but Mary thinks estate agents have been letting us down.

Mary heads to Burnham, near Slough, to visit Hallmark Foods, a local convenience store located in the heart of the village. This family run business is struggling, and profits are falling, as locals choose to shop elsewhere.

Marty heads to the Suffolk seaside town of Lowestoft to find out why a huge family run department store, Godfreys, has trouble attracting customers.

Mary Portas heads to south east London to help struggling, family-run fashion boutique Diosa. The shop was opened by Gemma who hoped to target fashionable young local women, but the investors urged her to target the middle aged segment as well.

Mary's secret shoppers visit a struggling car dealership Gatehouse Cars in Aylesbury and discover that some of the salesmen swear in front of customers, smoke in the cars and ignore potential buyers.

Mary takes on a struggling bridal boutique in Surrey. The married owners are fighting for survival, with mounting debts and piles of unsold stock.

Retail expert Mary Portas takes on a hair salon in Sidcup, Shobie and Co, where staff are at war with the owners and swearing on the shop floor is driving customers away. Can Mary unite the team and save their business?

Mary Portas looks to turn around the fortunes of The 157 Store, a menswear store near Portsmouth. Owner Andy's laddish behaviour and outdated style is turning away customers and Mary has a battle on her hands when he refuses to change.