The candidates receive an early morning call, telling them to gather in the sitting room of their London townhouse. Still in their pyjamas, the teams are briefed on this week's task: to grow a business from scratch in 48 hours. Starting with £150, they must source stock for a market stall, then buy more of their best sellers, before opening shops the next day. Before sending them off, Lord Sugar mixes the teams up and decides that, for this task, the boys should compete against the girls. After deciding what to sell, they head straight out to source stock. One team settles on fashion, while the rest plump for homeware - but while some get off to a flying start, others lag behind. Stock sorted, the teams get selling from their stalls. Will their chosen stock fly off the shelves? The next day the teams sell from shops built from converted shipping containers in London's trendy Shoreditch.

• Mark Burnett

• Katherine Jenkins
• Karen Brady
• Claude Littner