After Chicago Fire Revealed What Still Terrifies One Veteran Firefighter, I'm Wondering If It Would Be Better If Casey Came Back

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• In the winter premiere, longtime firefighter Mouch revealed a harrowing experience from his past that still terrifies him, adding new emotional depth to the character.
• With Mouch's backstory shaking up the firehouse, some fans are hoping it could signal the long-awaited return of former Lieutenant Matt Casey, whose absence has left a void that many feel could be filled.