In the final episode of the first series, Jake Barker and Ryan Johnson steal the time card, and the three friends must hurry to find it (and the bullies) before history is changed. The Daktars threaten again, and Commander Tam Harnik hones in on the kids and the time card.
In Episode 4, Tam Harnik tries to remain undetected by melting in with the general population. Ellie talks Blue and Jesse into using the time card to go to Harvard. The kids run into trouble when Harvard security questions them and Ellie tells them the truth. Blue and Jesse have to rescue her from the flabbergasted adults and a Daktar alien.
Tam Harnik, encounters trouble with tracking down the lost time card. The bullies have been snooping around the computer shed. The three friends find themselves chasing the bullies through the past, trying to stop them from upsetting history and changing all their histories. Will they save the timeline? Or will a change in the timeline be something they find they actually want to keep?
In this episode the pilot of the craft that jettisoned the mysterious case meets with a mysterious Admiral and is tasked with retrieving the case before evil forces find it. On earth, Blue, Jesse, and Ellie accidentally find themselves in 1776. After Jesse accidentally changes the course of history, the friends must race to save Thomas Jefferson before the power runs out on their chronometer.