Sara Davies, Touker Suleyman, Deborah Meaden, Tej Lalvani and Peter Jones cast their eyes over the final batch of business pitches of the current series. Stepping into the arena are an inventor who has come up with an unusual way of controlling household draughts, a businessman who claims there is money to be made in encouraging dogs to eat bugs, a fitness teacher who launches into a shimmying session, and the creator of a high-end garment bag. Evan Davis oversees proceedings as the Dragons decide if any of these pitches are worthy of investment.

A colourful hair entrepreneur offers one Dragon a new look - and all of them a new investment opportunity.

A fresh batch of nervous entrepreneurs strive to seal a life-changing deal. Tonight's hopefuls include two low-alcohol brewers who hope the Dragons will stump up for the ultimate round of investment.

In this catch-up special, Angela Scanlon discovers what happened next for some of the most memorable entrepreneurs to have survived the Den.

Peter Jones, Deborah Meaden, Touker Suleyman, Tej Lalvani and new Dragon Sara Davies take us beyond the Den and into the brave new business world of their most promising investments. What is it like to strike a Dragon deal worth millions of pounds? How has the Den lead to a murder trial for one businessman? And Angela settles on the sofa to relive tough, tense and funny moments from recent series with the entrepreneurs who will never forget them.

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.

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?

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.

Twin drinks entrepreneurs set up a bar in the Den in the hope of starting an investment party. An inventor is looking for a Dragon partnership to help his pipe-fitting tool become every plumber's mate. And the creator of a range of men's cosmetics gives one Dragon a mini-makeover.

Familiar face and former Dragon Theo Paphitis makes an explosive return to the Den as he stands in for Touker Suleyman, who is recovering from a short illness. Theo Paphitis joins red-hot investors Sara Davies, Peter Jones, Deborah Meaden and Tej Lalvani in the famous chairs.

The line-up may be different but negotiations are as tough as ever as entrepreneurs pitch for the deal that could transform their businesses. Ideas include a diet plan app from an entrepreneur with a glowing record in the industry, a Cornish clothes-mending workshop, and a device that helps cyclists rescue slipped chains. Also bidding for investment is an animal-loving entrepreneur whose doggy treat range includes canine birthday cakes – but will she be celebrating?

An eco-friendly entrepreneur has to suck up feedback on his innovative straw alternative, while a skincare influencer brings her very personal brand to the Den. An invention designed to make bikes more visible is in the sights of the investors, and there is proof that even Dragons have hearts as a foodie entrepreneur draws the investors into his family story.

A pair of porridge entrepreneurs invite the Dragons to a teddy bears' picnic with a breakfast twist. Academic traditions are turned on their head by two graduates who are determined to disrupt a very established marketplace. An Irish inventor whose dad helped create his dream product hopes to add a new power player to the family business. And things in hot up in the Den when the Dragons meet an entrepreneur who believes the best way to drop a few inches is to wear an extra layer.

Making their pitches this week are the creator of a brand of spiced rum, who gives the studio an exciting new look, a couple who have brought their four-legged friend with them to demonstrate a range of pet food, and the inventor of a special toilet gadget.