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The Flash Makes a Major Change to a Core Character

SPOILER WARNING: This article contains major spoilers for "Fury Rogue," the latest episode of The Flash.

The Flash's Harry Wells is losing his intelligence. In "Fury Rogue," the latest episode, Harry discovered that his Thinking Cap had more or less fried his brain, causing him to slowly lose his ability to innovate and create.

The trouble started in "Lose Yourself," when Clifford "The Thinker" DeVoe attacked Team Flash at STAR Labs. When the attack began, Harry rushed to Reverse-Flash's secret lair, where he had stored the Thinking Cap. He ordered Gideon to crank the Thinking Cap up to its full capacity. Gideon warned him that infusing his brain with so much dark matter may have a catastrophic result. Harry ignored her warning and tried anyway. As soon as the Thinking Cap kicked on, it shocked him and caused him to seize.

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This week, Harry learned the true extent of the damage it caused. Gideon showed him a diagnostic of his brain, pointing out that the center that controls his intelligence is deteriorating. He ran multiple tests to confirm, but the result was always the same. Though he knew he was slipping, he decided not to tell the rest of the team.

However, Cisco eventually forced it out of him. After Cisco repeatedly asked Harry to develop a Thinking Cap for him, Harry broke down and revealed what had happened in order to protect Cisco. He also revealed the source of his season-long insecurity; because his intelligence is the one thing he brings to the team, he felt overwhelmed by the threat of the Thinker, causing him to go to great lengths to compensate for his failures.

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Though Cisco promised to help Harry find a cure, it seems as though Harry will continue to slip over the next few episodes. In "Harry and the Harrisons," the episode airing on May 8, he will be kicked off the Council of Wells, which he established as a brain trust dedicated to solving world-ending problems.

Airing Tuesdays at 8 p.m. ET/PT on The CW, The Flash stars Grant Gustin as Barry Allen, Carlos Valdes as Cisco Ramon, Danielle Panabaker as Caitlin Snow, Candice Patton as Iris West, Jesse L. Martin as Joe West, and Tom Cavanagh as Harry Wells, with guest appearances from Keiynan Lonsdale as Wally West and Hartley Sawyer as the Elongated Man.

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