Parallels

Parallels is a science-fiction adventure series that follows the story of a small band of people traveling across parallel earths. Ronan, Beatrix and Harold go to find Alex Carver (Ronan and Beatrix';s dad) at a strange abandoned building in the middle of the city. They enter the empty building and all the lights start to flash. As they leave the building they discover that they are no longer in the same city as they knew. They meet a new girl called Polly who seems to know what is going on who tells them that they need to be back in the building within 36 hours or it will leave without them.