It may be a time of austerity in the UK but not so in the Dragons' Den... business is booming as the self-made multimillionaires return to the screen, ready to boost the economy by investing in the brightest and best of Britain's entrepreneurs. Whilst the rules of the series remain the same, you will notice one change... the arrival of new Dragon Hilary Devey, who joins the line-up of the five fearsome financiers. Having scrimped, saved and self-sacrificed in the haulage industry to make her own fortune, Hilary has her own views on the products and businesses brought before her, and she's more than happy to take on her rivals in order to get the best deal. 34-year-old Georgette Hewitt, from Kent, finds out exactly how nerve-wracking it can be to climb those famous stairs and pitch to the Dragons. It's a real battle to compose her nerves, but one she must win in order to tempt the multimillionaires to invest in her answer to a common birthday party headache familiar to all parents. Entrepreneurs often take advantage of the latest government schemes and incentives when building their business, which is exactly what Chris Hopkins from Yorkshire has done by capitalising on the solar power feed-in tariff. But when a Dragon knows your industry inside out it's not always what you want. Add into the mix the most unusual use you could ever think of for a plastic egg, a circus act that's sure to go with a bang, and a mind coaching massage service, and you've got a formidable showcase of the Great British spirit of invention and innovation. As ever Evan Davis is on hand to dissect the events, with further action and reaction available through the Red Button.

Dragons' Den continues with eight more intrepid entrepreneurs pitching Britain's brightest ideas to the multimillionaire investors. Will any of them manage to make the Dragons part with their cash? Tonight's episode sees Londoners Krissy Sims and Kerry O'Brien AKA DJ Trickles and Lady MC enter the Den with a state-of-the-art turntable extravaganza in the back of their 4x4. The Dragons are often happy to demo a product but it is the business and how it makes money that remains their ultimate concern. Husband and wife team Liz and Alan Colleran from Dewsbury may be pitching their comfy caravan product - but will their Den experience be quite so luxurious and comfortable? Elsewhere, an Englishman, a Norwegian and a Scot walk into the Den. Shades for canines are on offer, there's an inflatable car-based device like you have never seen before and a Kent-based entrepreneur thinks honesty is the best policy when pitching without a formal business plan - but with an offer to help everyone get the perfect looking body for just 20 pounds. With further interviews and reaction available via the Red Button at the end of the programme.

It's a Den full of family businesses. Tim and Meena Kalia and their business partner Tricia Tierney try to talk the Dragons into investing in their innovative litter trays for dogs. The Den is taken over by a pirate, a street urchin and a hippy as Peter and Michelle Hart, plus five of their seven children, pitch their fancy dress business; but is their dream of investment pure fantasy? Brothers Jim and Richard George from Malvern believe they're in a strong position with their fence preservation company which is already trading. The business-savvy siblings have a deal in mind - but will the offer they're holding out for materialize? Others looking for Dragon investment include an 'all you can drink' membership club, an exercise suit that claims to burn extra calories, and some giant knitting needles.

Some of the nations' budding businessmen and women have already entered the Den, but so far not all of their products and inventions have received a rave reception. This episode sees more intrepid entrepreneurs climb the stairs in the hope of realising their own investment dreams. Numbers are crunched and ideas are interrogated as the five fearsome Dragons weigh up which side of the coin their decision to invest will come down on. A former disc jockey has a strategy, dress to impress to catch the attention of an investor. The DJ may have worn a DJ, but is that all it takes to part a Dragon from their cash? A Londoner hopes to alleviate a common worry for holidaymakers by locking up their valuables, but with just 5 per cent of his company on offer, can he guarantee a valuable return? Monterrey-born Marcela Flores Newburn pitches her Mexican food range complete with a full mariachi band, another budding entrepreneur asks the multi-millionaires to think of their homes, not as houses but as a source of income, and a former hairdresser has a product that makes money from thin air, but does he have the business plan to match?

Dragons' Den is once more open for business, with the five multimillionaire investors ready and willing to invest in Britain's best commercial prospects. This time all the world's a stage and the Dragons merely players when two business partners from Lincolnshire pitch their pantomime company. But by turning the Den into a makeshift theatre, can they prove that show business and financial business really do mix? Elsewhere, one entrepreneur uses his pitch to tell the Dragons a story about growing up in South Africa, rather than concentrating on facts and figures, but how will that go down with the multimillionaires? Plus two joggers enter the Den to pitch their fast-paced delivery service; and a young mum offers a solution to everyone's outdoor toilet needs.

Profitability and bottom line are back on the agenda as more business proposals are pitched to five of the most successful commercial brains in Britain. Each of the entrepreneurs entering the Den are hoping to convince the multimillionaires that their business is worthy of financial backing, but as well as a good product it takes steel and determination to secure the Dragons' cash. There are mixed fortunes in the Den this time as fashion-conscious twins try to persuade the Dragons to buy into their clothing range, a Teesside-based entrepreneur has a run-in with the investors over his decision to separate out the assets in his company, and a former firefighter asks the Dragons to invest in a car that thinks it's a bike. One multimillionaire also gets their feet wet while trying out a beauty treatment administered by fish, but will a bit of Dragon pampering lead to a clean sweep of offers?

There are some true inventors in the Den this episode, including a returning entrepreneur with a new outdoor space saving device, a golfing duo with a new take on the traditional tee, and a designer who has flipped the conventional umbrella on its head. The Dragons come face to face with a fellow multimillionaire and the Den is filled with children's teepees. With a fair amount of game playing, gambling and bargaining taking place, will anyone manage to secure a deal?

The Dragons assess the profit-making potential of an eco-friendly entrepreneur's alternative to straws, a range of skincare products, a device designed to make bikes more visible, and a brand of food with a personal story behind it. Evan Davis presents.

Tonight, an inventor tries to recruit the Dragons for his war on household draughts, and a micro-businessman introduces the investors to the idea that dogs eating bugs could be a good (and profitable) thing. There is a shimmying session with a fitness teacher, and the creator of a high-end garment bag demonstrates an unshakeable belief in the value of his business.

Former Dragon Theo Paphitis returns to the panel to stand in for Touker Suleyman, joining Sara Davies, Peter Jones, Deborah Meaden and Tej Lalvani in assessing more business ideas. This week's entrepreneurs pitch their ideas for a diet app, a clothes-mending workshop, a gadget for repairing bicycle chains, and a range of dog treats.

More plucky entrepreneurs prepare to enter the Den, but it won’t be easy to impress feisty multimillionaires Peter Jones, Deborah Meaden, Tej Lalvani, Sara Davies and former Dragon Theo Paphitis, who is standing in for Touker Suleyman. Those ready to brave the heat of the Den include a Scottish sauerkraut enthusiast who wants to balance the Dragons’ gut bacteria as well as boosting the health of her business. The investors also listen out for the opportunities offered by a new breed of phone alarm app, and one entrepreneur thinks he has the solution to post-festival waste.

Only the bravest business people dare to set foot in the Den, where multimillionaire investors Peter Jones, Deborah Meaden, Tej Lalvani and Sara Davies breathe fire. Joining them is Theo Paphitis, who is standing in for Touker Suleyman for the last time this series. A Yorkshire shepherd and his business partner hope the Dragons will flock to invest in their field-to-fork lamb delivery boxes. An inclusive fashion designer brings a little street style to the Den, and a confectionery pioneer hopes to bag a sweet Dragon deal with his low sugar, dairy-free chocolate. But will their pitches make the Dragons bite or fight?

Tonight’s hopefuls include a beauty entrepreneur whose tools have a social as well as practical purpose and two low-alcohol brewers who hope the Dragons will stump up for the ultimate round of investment. And the multimillionaires try more than a business on for size when a footwear entrepreneur pitches his range of hand-finished shoes. Will he leave the Den walking on air?

Entrepreneurs pitch portable toilets for kids, crunchy mushroom snacks and a range of sustainable clothing.

Crafting queen Sara Davies, joins Peter Jones, Deborah Meaden, Touker Suleyman and Tej Lalvani. In this episode, a spiced rum entrepreneur gets the party started with a rock 'n' roll makeover.

Entrepreneurs face the fiercest line-up in business. Syrian refugees Razan and Raghid Sandouk bring their British-made alternative to Cypriot halloumi to the Den.

A brewer’s high-strength hooch pole-axes a Dragon, a cruelty-free watch strap uses some surprising materials, and the makers of an eco-friendly deodorant make the Dragons jump out of their skin.

The Dragons decide whether to invest in a sparkly party-wear business or pop-up board games. A cleaning product entrepreneur aims to make a positive social impact by turning homes into mini factories.

A pair of porridge entrepreneurs invite the Dragons to a teddy bears’ picnic and academic traditions are turned on their head by two graduates who are determined to disrupt an established marketplace.

The panel oversee more business propositions, with returning Dragon Theo Paphitis joining regulars Peter Jones, Deborah Meaden, Tej Lalvani and Sara Davies. Two entrepreneurs seeking funding for a range of drinks go to the lengths of setting up a bar in the studio, while other items up for assessment include a design for a pipe-fitting tool and a range of men's cosmetics.

Tonight, a colourful hair entrepreneur offers one Dragon a new look - and all of them a new investment opportunity. A cheesecake maker has sweet dreams of a cash boost for his franchise model, but will his pitch be the stuff of nightmares? And a husband-and-wife team hope their electrical invention will make sparks fly in the Den as rival Dragons Deborah Meaden and Sara Davies line up to try it out.

The Dragons listen to pitches from a couple who organise social events for four-legged friends and a 29-year-old with a larger-than-life clothing business.

The Dragons are pitched a second-hand clothing swap shop concept, a concertina dog gate and a state-of-the-art mobility device which gives wheelchair users independence.

A Welsh grandmother has the Dragons in fits of laughter as she cooks up a storm and offers a percentage in her food loving website. Usual Den rules are blown out the window when a Tyneside couple pitch their innovative haircare brand for children, and the man who has built the world's biggest sand sofa tries his luck for investment. Elsewhere, Peter Jones tries out an interactive game in a urinal, Deborah Meaden tries lava bread for the first time and Hilary Devey reveals what a multimillionaire's horse eats for breakfast.

Eight more intrepid entrepreneurs brave the Den hoping to gain a major cash boost for their business idea. It's a tense place to pitch with so much at stake, and these Dragons are famously hard to impress. The hopefuls will need to hold their nerve if they wish to succeed in getting the investment they require to take their business to the next level. A horror story writer attempts to scare the Dragons into investing, but doesn't quite get the reaction he expects, in fact it's a reaction never before seen in the Den. There's a blast from the past as two Mancunian sisters who first walked up those infamous stairs back in 2005, are now asking for investment in their new gluten free oriental dipping sauce range, but will it be a case of better luck second time around? And with the kids all back at school, two friends hope now is the right time for investment in their innovative children's backpack designs - have they got what it takes to part five of Britain's most successful business men and women from their hard-earned cash? Also pitching to the multimillionaire investors is a Northern Irish inventor with his unique range of wearable luggage, and love is in the air when two Dragons tie the knot using a rather unusual vending machine.