Whilst Yvonne is in Korea on business, Gary and Ron concoct an elaborate scheme so that Gary can spend the week on holiday with Phoebe in 1942. When Gary's father unexpectedly turns up, Gary discovers his father has been keeping his own time travelling secret.

Gary and Phoebe take a trip to Liverpool to visit Phoebe's gran, while there he meets Ron's grandfather, who was famous for saving a child from a burning building. However, when the apparent "hero" is arrested, Gary returns to a shockingly different 1997.