The remaining candidates head to the London Library in St James' Square, where Lord Sugar briefs them with instructions.
They have to write and design a children's book and record an accompanying CD before selling it to London's bookshops.
For one candidate it's a dream task, but going up as Project Manager isn't so smooth-sailing.
One team struggle against deadlines, while for the other find themselves in disagreement over how to record the story.
However, by the next morning, both teams have their finished books in hand, but they stumble as they try to flog their products with clashes and pitiful pitches leaving both teams struggling for sales.
Who will be the losing team? And which three will have to face Lord Sugar in the boardroom before he tells them, "You're fired"?
Tune in to find out who is the fifth candidate to hear Lord Sugar's immortal words on Wednesday 4 November, 9PM on BBC One and BBC One HD.
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