Agent Christopher orders Wyatt to eliminate Rufus's coworker Anthony, whom Flynn abducted when he stole the time machine. In 1962 Las Vegas, when atomic tests are common near the city, Flynn uses intimate photographs to blackmail John F. Kennedy's mistress, Judith Campbell, into helping him steal a plutonium core, as her relationship with a general enables her to access a secure nuclear facility. Rufus discovers that Anthony is Flynn's willing collaborator; they are working to destroy Rittenhouse.
Anthony seemingly relinquishes the core to Rufus, and Rufus prevents Wyatt from killing his former colleague. The team discovers the core is a decoy while Flynn successfully escapes with the real device. Wyatt arranges for a telegram to be delivered to his wife in fifty years, attempting to save her life in 2012. Upon their return to the present, Wyatt learns that his wife is still dead and he covers up Rufus' protection of Anthony; Lucy tells her fiancé, Noah, that she needs to move to her mother's to clear her head. In the Nevada desert, Flynn and Anthony dig up the plutonium core, which they had buried rather than risk transporting it through time.
- The Bad Guy Wins: Flynn gains a battery capable of powering his time ship for centuries.
- The Dog Was the Mastermind: Judith Campbell is the target of Flynn rather than the President himself.
- Downer Ending: Judith will die of cancer after a period of public disgrace despite bonding with the team.
- Femme Fatale: Subverted with Judith who is just extremely attractive to powerful men.
- For Want of a Nail: You'd think stealing a nuclear weapon would have more repercussions than it did.
- Nice Girl: Judith Campbell is this as well as Smarter Than You Look.
- Not Brainwashed: Anthony turns out to be working willingly with Flynn.
- Viva Las Vegas!: The setting of the mission during the city's heyday.