Bob's too busy to even tell the machines what the job is for today. He takes Scrambler to the dome and the others follow. It turns out that they are going to turn the whole of the Dome into a Visitors centre and its opening tomorrow! The machines job is to fetch the Plesiosaurus fossil down from Sandy's cave. It's going to be a special display right in the middle of the Dome. Everyone else arrives with their plans for the displays. Mr pickles is about his farm, Marjorie's about sunflower produce, Mr Sabatini will show the bread making process, Mr Bentleys is all about his house and even Mr Beasley has turned up with an idea for his tropical fruit farm. Bob is rushed off his feet trying to help everyone at once, and to top it off the machines send Dizzy to ask when they can collect the fossil. He is far to busy to go with them and by the time all the displays are ready, the day is nearly over. He goes outside to find that its dark and the machines have all gone.