The Sparticles reach the Quantum Nexus at last and the race is on to see if they can bring back the adults or stay in the world of Emperor Fizzy for ever. A curious old friend looks set to help. Dora had set up a hologram version of her self called 'HoloDora', whom she believes to be Dora's daughter and when the children are detected by 'HoloDora', she change to help them to bring back the dimension with the parents. Reese attempts to modify the magnetics of the Quantum Nexus in order to damage the machine due to her worries of connect the wrong dimensions. Reese fails to do this, as she does not know the two dimensions are connected. The wrong dimension is set to come to Earth, which results in the adults - now teenagers - arriving.

• Jon East, Jonathan Fox Bassett, Tim Whitby

• Annette Badland
• Larissa Wilson
• Jerome Holder