EXCLUSIVE: 'Nashville' Sneak Peek! Gunnar Flashes Back to the Emotional Day of His Parents' Death

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is digging into the past.

On Thursday's episode, titled "Speed Trap Town," the country music drama goes back to Gunnar's (Sam Palladio) hometown in Texas -- and it's an heart-wrenching look back at one of the saddest days of his childhood.

In ET's exclusive clip, Gunnar visits his abandoned elementary school, which is about to be torn down, prompting the singer-songwriter to flash back to the day he was given the devastating news that his parents died.

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When Gunnar flashes back to that moment, young Gunnar is called into the principal's office and he senses that what's to come isn't going to be good news.

"Beyond awful," the principal says to a devastated Gunnar, whose grandmother comes in to take him and his brother, Jason, away. "I'm sorry to have to give you this news." Watch the exclusive sneak peek above.

airs Thursdays at 9 p.m. ET/PT on CMT.

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