CGI animation. Ernie, controller of International Underground, is always on hand to help his friends and to get passengers to their destinations. He is helped by trains Victoria, Bakerloo, Circle, Jubilee and the twins Hammersmith and City. Pop superstar Sam 7 is playing at the theatre and it's up to Jubilee to get him there without hundreds of fans finding out. Unfortunately, Jubilee lets the secret out and he and Ernie have to find a way to get Sam 7 to the theatre without being mobbed. Show less