Revelations - S4-E22
Revealing mistake: When the group is fleeing from the cops, there's a shot of the road as they're turning. The camera used has a crack, or piece of debris, on it at the top to the left. The black line doesn't move as the camera pans across the road.
Chosen answer: Remember at first Quinn's timer is working perfectly (it's only because they slide off the ice age world early that it begins to malfunction) & given Quinn's intellect he would have devised a way that he could open a wormhole near him so he wouldn't be trapped on that world for 29 years.