Flat Pack is the 11th episode of season 4 in the animated series.
Mr. Bean's bookcase collapses, so he buys a new one in the hardware store. He is annoyed to learn that he has to assemble it himself. Bean attempts to assemble it but fails miserably - a screw is missing. So he goes back to the store to steal a screw. Finally, he joyfully assembles the bookcase.