 PLOT: SPOILER: When Vaughn and Sydneys Double are sitting outside  the jewelery store, Sydneys Double asks Vaughn how he wants to  handle things when they get in the store. Vaughn replied "like we  did in Cartegena" Later when Vaughn reveals that he knows Sydneys  Double is not really Sydney, he says "Sydney and I never went to  Cartegena." However, in Season 2s episode "Countdown", when Dixon  is threatening to blow up the train car with Sydney and Vaughn  looking on, they were in Cartegena.