|Three Spies and a Baby|
|Series 04, Episode 10|
|Airdate||February 22, 2010|
Three Spies and a Baby is episode 10 of Series 4.
Olaf and Hannah Stein are the cleverest people in the world. They have developed the M.I.9 computer firewall and no one else in the world can crack it. Due to their brain power they are in high demand. The spies are sent to escort them to a conference and ensure their safe arrival, but something goes terribly wrong - the Steins are kidnapped right under the spies' noses. But not all of the Steins have been kidnapped - their baby, Grace, is left behind.
Back at Saint Hopes, Mrs King gives the class computerized infant simulators as an exercise in how to look after children. They look like real babies, sleep like real babies and need feeding just like real babies. This allows the spies to smuggle Grace into Saint Hopes without being noticed. Carrie and Rose are less than happy to be babysitting Grace, but Oscar is over the moon. Grace is the baby sister he never had and he loves it. If only he could play with her all day.
Unfortunately, the M.I.9 firewall is under attack, and the spies realise that it must be the Steins. Whoever has kidnapped them is using their brainpower to crack the M.I.9 database. Oscar is convinced that Grace is trying to tell him something. Why is she craving ice cream? Can the spies communicate with Grace and find her parents in time?