[s6e4] There Will Be Blood -

: By utilizing dark matter and human blood to survive, he turns innocent victims into his own personal, zombie-like blood bank.

: Cisco Ramon (played by Carlos Valdes) refuses to accept a universe where Barry dies. His aggressive desperation to save his best friend puts him at direct odds with Barry’s attempts to prepare him for leadership. [S6E4] There Will Be Blood

: Desperate to cure his fatal HCLS, Rosso abandons his Hippocratic oath entirely. : By utilizing dark matter and human blood

On the lighter but equally mysterious side, the newly introduced adventurer Nash Wells continues his cosmic excavation. By the end of the episode, his relentless tracking pays off as he successfully locates the hideout of the mysterious Monitor. 📢 The Verdict : Desperate to cure his fatal HCLS, Rosso

Rosso's transformation into the villain is completed in a chilling hospital sequence where not even Barry can pull him back from the dark side. 🗺️ Nash Wells and The Monitor