(W) R.F.I. Porto (A) Gavin Smith (CA) Walter Flanagan. Time travelers Alexa and Bertram pursue each other through the decades in a deadly chase. Each is armed with a time machine that has only one rule: it can only move forward in time* never backward. Alexa must leap further into the future* with Bertram never far behind. Caught in the crossfire is Spatz* a teenager from the 1990s who tries to help but instead gets dragged into another time.