In the series opener, the Dragons ponder the investment opportunity in pint-sized pencils, oversized beanbags and a boot-cleaning device invented by a 15-year-old football fan. But will the revelation of a huge company debt mean it is game over for this fledgling family business?

Peter Jones, Deborah Meaden, Touker Suleyman, Sarah Willingham and Nick Jenkins take their seats to face a fresh batch of entrepreneurs who dare to enter through the Den doors. In this episode, the Den's five multi-millionaire investors probe the money-making potential in wearable maps, interference-free guitar cables and an entrepreneur with a business selling manhole cover keys that has come back from the brink of bankruptcy. Will it be second time lucky for the plucky entrepreneur or will he see his investment hopes go down the drain?

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Dragons' Den is back and is open for business. Peter Jones, Deborah Meaden, Touker Suleyman, Sarah Willingham and Nick Jenkins take their seats to face a fresh batch of entrepreneurs who dare to enter through the Den doors. In this episode, tensions are running high as an entrepreneur ruffles some feathers in the Den when he fails to clarify his restaurant business model, a husband-and-wife duo fight to defend their innovative drilling tool gadget, and it is sink or swim for a businessman pitching his portable water-saving product. But will any of the Dragons see the potential in his eco-friendly design, or will they wash their hands of it?

Projects up for investment this week include an unusual coffee lid, a range of coconut-based products, and a safety device for hairstyling gadgets.

A merchant navy officer-turned-product designer demonstrates his tablet holder, while two proud parents pitch their organic skincare product for babies. A young entrepreneur hopes to impress with his activity monitor for pets, but will the Dragons see the potential in his innovative product, or will he be left in the dog house?

Budding entrepreneurs pitch business ideas to multimillionaires. A former panel beater hopes to seal a deal with the Dragons with his innovative nail gel product.

Scottish entrepreneur bearing chocolate gifts, a couple of city slickers selling socks and a teacher trying to get the party started with his dance mats are all hoping the Dragons are feeling generous in the season of goodwill. And finally, for the tennis coaches offering active holidays, will it be game over or will they walk away with a sack full of cash?

Budding entrepreneurs pitch business ideas to multimillionaires. Two former army captains hope to get the Dragons to stand to attention with their bespoke gifting business. A young duo pitch their innovative ticket comparison site and a pair of multi-millionaire entrepreneurs are seeking cash from the multi-millionaire Dragons' for their new safety device. Will the Dragons have finally met their match or will they see the potential in a deal?

The Dragons ponder the investment potential in pop-up inflatable igloos, a meat-free hot-dog restaurant concept and a canine poop-scooping device. Will the Dragons find the product barking, or will dog-lover Deborah Meaden be tempted to take a punt?

Budding entrepreneurs pitch business ideas to multimillionaires. Touker Suleyman gets more than he bargained for when he agrees to road test an intimate waxing product, an entrepreneur makes a shocking revelation about sleeping on his office floor and a serial inventor who says he has re-invented the surfboard and designed a parachute for NASA brings his latest garden shed invention to the Den.

Evan Davis presents the business ideas contest, with panellists Deborah Meaden, Peter Jones, Touker Suleyman, Sarah Willingham and Nick Jenkins assessing the profit-making potential of a range of dolls inspired by historical events, a new kind of bicycle indicator light, and a honey-infused drink made by a pair of beekeepers.

An entrepreneur gets emotional when pitching her language teaching for kids, a businessman with a security device for patio doors tries to lock in some Dragon cash and a couple with an innovative device for the hard of hearing get short shrift when they discuss their business set-up. Finally, one half of a duo behind a soup range enters the Den, but with his business partner too camera shy to face the Dragons, will he be able to withstand their interrogation alone?

The Dragons are pitched effervescent wheatgrass tablets, customised in-ear headphones and a dapper teacher seeks investment in his online male grooming business. Finally, an Irish husband and wife team enter the Den with their range of baby products but when Touker Suleyman breaks one of their products, will they ever manage to secure investment from the Dragons?

A self-assured Scottish entrepreneur pitches his fitness company for children, a businesswoman looks for investment in her authentic ethnic snack business and an engineer enters the Den with his self-igniting wood burning stove but sadly fails to spark the interest of Peter Jones. Finally a tech whizz-kid showcases his new take on the dating app but will it be a match made in heaven when he meets the Dragons?

Deborah Meaden, Peter Jones, Touker Suleyman, Sarah Willingham and Nick Jenkins assess the profit-making potential of a husband and wife team's Welsh delicacy, a new male fragrance, and a London businessman's food delivery service for Michelin star restaurants. Presented by Evan Davis. Last in the series.