When Elizabeth and Jack settle in to binge watch their favorite schlocky tv series—Into the Shadows: Secrets Uncovered—they expect to see a Muppety chupacabra and a very iffy reenactment of Aztec death rituals. What they don't expect is that this week's guest has a photo of one of the Council's time travel watches and claims his slightly-unhinged grandfather traveled through time.

Tasked with retrieving the watch, Simon, Elizabeth, and Jack travel back to 1956 Los Angeles and find themselves caught in a tangled web of Cold War espionage and kooky UFO conspiracy theorists. Desperate to keep the watch out of the government's—any government's—hands, they race Russian spies, the CIA, and even the Men in Black to get to the watch first.