 Club" Zack Handlen rated the episode a "B-".Handlen considered that while "'Synchrony' has all the pieces of my favorite kind of episode, [it] doesn't really work as well as it should" due to an emotional detachment that made him not care about the scientists and their story, and his finding Old Jason's actions to be illogical.Paula Vitaris from "Cinefantastique" gave "Synchrony" two out of four stars, considering it a middling episode with some effective moments, but complaining about plot holes, "not particularly compelling" supporting characters, and feeling that time travel "takes away from the reality that is this show's foundation".