For one lucky birthday boy, 26-year-old Molly Robbins is making a two-foot-tall, dinosaur-covered cake complete with royal icing volcano. Meanwhile, Lancaster-based Rosie Dummer hopes to wow her former Army Airs Corp colleagues with an impressive, six-foot-wide, gravity-defying helicopter cake. As an ex-helicopter pilot herself, Rosie knows that getting every detail right will be vital if she's to impress her military colleagues. Also in this episode is Karisha Pithwa, who is producing a stunning seven-tiered, carousel wedding cake decorated in 11 and a half stone of sugar paste.