Dana and Callum team up in a desperate search for Lewis. Will they be able to find him, in order to close the wormhole in time?

1 year after his life-changing chat to a stranger in 1999, Lewis now finds himself connecting with another time-distant individual. Who is the mysterious Dana, and how has she made contact from the year 2052? Does she know anything about the wormhole that appeared suddenly in Lewis's basement? And will Lewis agree to get involved, again, in another time-hopping adventure!?

Dana explains to Lewis about life in the future, how she managed to invent a wormhole, and how she plans to switch it off - for good this time! But will her creation be stable enough, to keep Dana and Lewis connected with each other?

CALLUM IS BACK! And this time, he's in 2003. Cue the 00's nostalgia, as he reconnects with his long-lost buddy, Lewis - but will Callum be happy with how his friend is living his life, in the future?

Dana teaches Callum and Lewis how to make a budget EMP generator, but with a Glasgow earthquake looming, will they have enough time to use their new devices?