Phil and Christine push cake and engineering boundaries with a steampunk flying machine, with real smoke! Nastassja goes speaker crazy for a DJ's 30th birthday cake, and the pressure's on Suzanne to please cake-loving clients with a dream wedding cake.

Molly must please her harshest critic, her mum, with a keep fit-themed birthday cake. Karisha's under pressure to match the demands of a very design-conscious christening cake recipient, and Michelle attempts a wedding dress cake illusion.

Baker Suzanne proves extreme cakes don't all have to be large as she creates an intricate Jacobean hall cake. Nastassja makes a lavish stained glass inspired wedding cake, and Molly recreates the Las Vegas cityscape, complete with a light show.