Summary: The Dragons return to pass their judgement on a toe-tapping pitch which sees the panel up on their feet. Also in this episode, Deborah Meaden goes for a slightly unconventional joy ride and Peter Jones thinks outside the frame with an offer the Den has never seen before. Will any of the entrepreneurs be able to entice the Dragons and secure that all-important investment?

Summary: The Dragons encounter a colourful Indian dance troupe and the weird and wonderful world of taxidermy and a young Yorkshire duo try to impress Peter Jones by eating their own product - dog food. Will they do enough to secure a deal?

Summary: A couple of university friends pitch their home-brew cider kits hoping to leave the Den victorious, and a loose-leaf tea company serve up a refreshing treat. The lift encounters a technical malfunction, and a former Economics student hopes to butter up the Dragons with his new nutty preserve. Will anyone walk away with a deal?

Summary: Sticky business in the Den: a product using nano suction technology has the Dragons glued, there's an alarmed LED walking stick and a marshmallow lover lets the Dragons get sticky fingers with her gourmet treats. For those who overindulge, there is a cycling brand for the larger figure, and the Dragons are invited to play with a new keepy-uppy toy. Will anyone be able to cement a deal?

Summary: More people bid to win funding for their projects from the panel, including an 18-year-old seeking to impress with his garden shed invention. There is a rip-roaring entrance by a Kent-based gaming entrepreneur and the Dragons get a taste of Colombia's finest cocoa beans. Will anyone be able to walk away with a deal? Evan Davis presents.

Summary: 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?

Summary: The Den is full of eye-catching businesses, with male leggings, high-vis sportswear, sandwich boards with a difference and an energy-efficient light bulb all up for scrutiny. A photo-booth company offers the Dragons the chance to capture their time in the studio, and Deborah takes a stroll on a lawn to test out a new stiletto accessory.

Summary: Kelly Hoppen receives an unusual phone call from outside the Den, a mother and daughter pitch their waterproof products for children, and a trio of breakdancers introduce the Dragons to some innovative earphones. The panellists are also serenaded by a group of princesses and have a go on a modern day penny-farthing. However, will any of them feel the urge to invest?

Summary: This episode opens on a theatrical note with a young actress-come-entrepreneur pitching her 'pimped-up heels', and a Yorkshire duo decide to set out a market stall to trade in the Den. The Dragons are faced with five eco-friendly coffins, get to grips with a sleek new electric toothbrush and meet a pop star's daughter with an online shopping service for men. Will anyone walk away with a deal, or will the curtains come down on their investment hopes?

Summary: Ideas pitched include an anti-piracy device for sailors, a children's bike horn, and a brand of ice-cream with an east Asian flavour. A Scottish entrepreneur tries to drum up interest in his shopping app and a family business tries to appeal to the Dragons' softer sides with their subscription boxes for babies. Can anyone walk away with a deal?

Summary: Two stuntmen glide in to the Den on a new form of transportation and an Edinburgh entrepreneur presents a subscription box of foodie treats for the panel to sample. A father-and-son team demonstrate a new safety device for boats, and the women behind a home-made marmalade brand try to whet the Dragons' appetites. Can anyone walk away with a deal?

Summary: Variety is the spice of life in the Den in this episode - edible insects give some of the Dragons the creeps, a couple of young entrepreneurs look sharp with their bespoke suit-tailoring business and an eco skip on wheels causes confusion in the ranks. Will a registered nurse gain investment for her life-saving product, or will the Dragons have more enthusiasm for a Scottish energy-drinks business? With Duncan saying farewell to the Den tonight, let's hope he goes out on a high...