Team Flash races against time to stop Bloodwork (Ramsey Rosso) from turning Central City into a city of mindless "Blood Brothers".

Kevin takes his twins to the family cabin, hoping to prove his competence as a father while overseeing the construction of his late father's dream home.

This episode serves as the midseason finale and a direct lead-in to the massive crossover.

Kevin Is "The Guitar Man" On This Is Us (Season 6, Episode 8 Recap)

The episode is known for heartfelt tributes as the team prepares for Barry’s prophesied death in the coming Crisis.