Summary: 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.

Summary: 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.

Summary: 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.

Summary: 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.

Summary: 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.

Summary: 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.

Summary: 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?

Summary: Dragons' Den is back with a positively festive feel. But seasonal goodwill is no guarantee of success for a new batch of entrepreneurs facing fiery multimillionaires Sara Davies, Touker Suleyman, Deborah Meaden, Tej Lalvani and Peter Jones. An eco-friendly gift wrap business gets a helping hand from Santa, while a sock entrepreneur embodies the holiday spirit with his buy-one give-one business model. And a pair of candle entrepreneurs try to convince the Dragons that their products can spark some serious profit. But while all the ho-ho-hopefuls dream of Dragon cash for Christmas, these investors don't give the gift of investment unless a business has real sparkle.

Summary: 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?

Summary: 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.

Summary: 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.

Summary: Syrian refugees Razan and Raghid Sandouk bring their British-made alternative to Cypriot halloumi to the Den, but will the Dragons think it is a tasty proposition? Breezing into the Den are partners in business and life Richard and Samantha, with their cutting-edge virus filtration gadgets. And Joe Metcalfe is hoping for a hand out from the Dragons with his charity-meets-commerce clothing business. Can he convince the Dragons that pre-loved can be profitable?

Summary: A German-Portuguese business combo have their business, which makes camera lenses for mobile phones, brought into sharp focus, but will they be in the frame for investment?

Summary: 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.