How Do They Really Do It? - Episode Guide

Documentary revealing the secrets of the successful bakery chain, offering a behind the scenes look at the products they sell and staff who work in their stores across the country.

The secrets of Britain's most popular budget boozer.

From Big Macs to chicken nuggets, what are the secrets of McDonald's global success?

Discovering the methods Subway uses to create its iconic sandwiches.

A look at what makes the perfect British roast dinner, from how to make the best roast potatoes to the ideal size and dimensions of a Yorkshire pudding. The programme goes behind the scenes at restaurant chain Toby Carvery, which serves millions of roast dinners across the country every Sunday.

Documentary delving into the secrets of the UK's biggest clothing retailer, revealing how a small Irish department store grew to become a high-street behemoth. The programme shows how the company's unique approach to advertising gets it plenty of publicity without a big outlay, and looks at how stores are carefully designed and curated to get customers through the door and spending freely.

Behind the scenes of the department store, revealing how they keep their products so cheap, fool customers with their brand names, and apply all manner of psychological tricks to make people buy more. Contributors include Grace Dent and Harry Wallop, TK Maxx buyers, store managers, consumer writers and super-fans.

What began as an online bookshop rapidly becomes the world's biggest retailer that has its fair share of ethical controversies and manipulations.

The secrets of the online food company's success, travelling with the delivery riders, revealing the meals to avoid and which foods stay hot and which do not. Experts and ex-employees reveal the hidden workings of Deliveroo to help show how online delivery really works, and there is a look at branding and marketing innovations - some of which have got Deliveroo into hot water.

The secrets of the fast-food chain, revealing how its advertising marks it out among its rivals, and how a clever pricing and location strategy give it a unique position in the burger market. The programme also looks at what the future holds as customers become more concerned with issues like food waste, the environment and plant-based diets.

For decades Argos has been a fixture of the Great British High Street - seemingly selling everything, we reveal what really goes on behind the counter at the high street giant.

Industry insiders, retail experts and former employees lift the lid on IKEA. Divulging the secrets of the massive maze-like warehouse shops, tricks they use to get customers to spend, and how the stores are designed to keep people there for hours.

Behind the scenes of the chain of retail stores, Poundland, looking at how its warehouses operate, putting core products to the test and uncovering the secrets of its highest-selling products.

A look inside the high-end designer shopping outlet.

The secrets of the fast-food delivery chain, which has nearly 1,200 outlets in the UK and supplies in the region of 100 million pizzas every year. This documentary goes inside the kitchens and behind the scenes of this pizza empire to meet staff and see first-hand how the pizzas are prepared and cooked, and there is access to one the business's distribution centres.

The secrets of the online fashion retailer, with insiders and experts revealing how it has become a global clothes-selling powerhouse in just two decades. The programme uncover how its hi-tech website works and shows how it encourages shoppers to spend and delivers discounts by tracking their preferences, and looks at how the company took on traditional fashion chains and even bought up some of the High Street's biggest brands to become one of the UK's fastest-growing businesses.

Behind the scenes of DNATA, the UK's largest in-flight caterer, where 24,000 meals are prepared from scratch every day for passengers on flights travelling across the world. The show delves into a world where food behaves poorly on board and not every component can make the cut, and where dish design takes months and must pass muster with airlines.

Tesco is the most successful supermarket chain in Britain. With around 3000 UK stores, it is the largest private sector employer in the UK.

With access to one of their largest stores, we spend 24 hours in Tesco to reveal the secrets behind this juggernaut's success. From finding out tips and tricks from Tesco staff to revealing the ingenious hacks to help you shop smarter.

We look at the history of Tesco and its founder Jack Cohen, the development into online shopping and deliveries, as well as finding out what happens in store from the moment they open their doors at 6am. This whirlwind of activity that keeps them at the top of the supermarket chain.

Documentary exploring how the supermarket chain keeps customers coming back for more, shedding light on how Aldi manages to sell its products at bargain basement prices. Bez from Happy Mondays tries out Aldi beer and Jason Manford's brother Colin tests out its own-brand ketchup, and there is a visit to Leicester-based bakery Gearys, who supply Aldi's in-store products.