Lancashire cake maker Rosie battles to stay on track with a replica steam engine cake, with a working track and an intricately decorated engine, it's surrounded by an edible country landscape, complete with a fully functioning model train. Eloise uses nature as her inspiration for a stunning wedding cake, decorating the four foot tall beauty with hundreds of handcrafted edible flowers. And Molly's away with the fairies for a first birthday cake, where she sets herself the challenge of hand sculpting over 40 items, including a fairy's tea party inside the hollowed out tree.

Cornish cake makers are go, and Phil and Christine are in their element, tackling a technically challenging bake with multiple moving parts for a Thunderbird 2 cake, with a remote controlled birthday greeting hidden inside! Eloise takes opulence to new heights with a four-foot tall tiered cake that includes a working gin fountain for a glamorous 40th birthday surprise. Suzanne channels the 1980s with a dance floor cake, complete with mirror balls, in honour of a hospice's 30th birthday celebrations.

The stakes are high as Essex baker Eloise creates a two-foot high edible slot machine for a surprise 90th birthday party, complete with a personalised message to the birthday girl, flashing lights, and a working coin slot. Karisha takes a huge chance as she attempts to suspend her largest wedding cake to date, all 10 tiers of it, from the ceiling for a spectacular reveal in London in front of 400 guests. Molly puts some muscle behind her cake for a champion body builder, who wants to celebrate the end of what he hopes will be a successful competition season with a cake full of all the things he's missed while training.