Series creator Sam Esmail confirmed last week the USA Network series will end after Season 4.
"Excited to show you guys the final chapter in Elliot's journey," he tweeted of Malek's character.
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"It's going to be sad to say goodbye to 'Mr. Robot,' but it'll be sadder to say goodbye to all the fans. Thanks for hanging with us throughout the years and cannot wait to share the conclusion with all of you."
"Just got the butterflies," Chaikin responded on Twitter.
"I've been waiting as long as all of you to find out where this is all going. Best roller coaster I've ever been on."
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