Rosie starts to say 'mama', raising hopes that her communication will finally take off. Emily feels totally outshone by Rosie's amazing schoolteacher and concentrates on developing her daughter's sign-language, while Simon worries that the other parents of special needs children look down on him. Things come to a head at the school sports day.

As Em gets excited about Si's annual quiz, Rosie becomes fixated on making her draw a specific picture over and over again. In 2008, Rosie suffers a frightening medical emergency.