: Barry’s attempt to fast-track a relationship with Iris backfires. In the previous timeline, the impending disaster forced a confession from her; without that pressure, his advances lead to a rift between them and a punch in the face from Eddie Thawne. Key Themes and Stakes
: In this timeline, the Rogues kidnap Cisco and his brother, Dante. To save Dante’s life, Cisco is forced to rebuild the Rogues' elemental weapons and, more critically, reveal Barry Allen's secret identity to Snart.
: Eobard Thawne (posing as Harrison Wells) warns Barry that time is a fickle thing. He explains that "saving" one person often results in the universe finding a "replacement" for that tragedy. This is tragically realized when the reporter Mason Bridge—who was investigating Wells—is murdered instead of Cisco.
: The episode concludes with a significant shift in the Flash-Snart dynamic. Barry realizes he cannot simply lock Snart away without risking his secret identity being exposed. He negotiates a "gentleman’s agreement": Snart can continue his heists as long as he doesn't kill anyone.
: Leonard Snart ( Captain Cold ) and Mick Rory ( Heat Wave ) return to Central City, joined by Snart's sister, Lisa Snart (Golden Glider).
Having lived through a tragic version of the previous day—where Joe West was kidnapped, Cisco Ramon was murdered by Dr. Wells, and Iris West confessed her love for him—Barry attempts to "fix" everything by using his knowledge of the future. However, his interference creates a different set of problems: