Young Sam (a girl) and Harry are mates at school. Both their dads bought train sets about the same time, but while Sam's dad completed an impressive layout, Harry's dad hasn't really started his. Sam and Harry decide to build one themselves in the garage. Harry and Sam are trapped by the Cyberman in the garage. Sam, who knows a bit about electronics, is made to follow instructions that will build a Cyber-conversion unit. As a very frightened Sam reluctantly completes the Cyberman's machine, she tries to push the Cyberman into the exposed wires. However, she is not strong enough.