The Speed of Thought

Summary

When Barry suddenly gains the power of speed thinking, he attempts to use his new gift to save Iris. While Barry is thrilled with his new power, Cisco is hesitant to trust it. Meanwhile, Eva must face a shattering truth.

Guest stars

• Carlos Valdes as Cisco Ramon
• Victoria Park as Kamilla Hwang
• Efrat Dor as Eva McCulloch / Mirror Monarch
• Matt Letscher as Eobard Thawne / Reverse-Flash
• Natalie Sharp as Millie Rawlins / Sunshine
• Stephanie Izsak as Officer Daisy Korber
• Patrick Sabongui as David Singh
• Morena Baccarin as Gideon (voice) (uncredited)
• Jessica Hayles as Arielle Atkins
• Tom Cavanagh as Dr. Harrison Wells