The "Snowpiercer" train is finally on track and ready to leave the station.

At San Diego Comic-Con this weekend, TBS unveiled the first trailer for the reboot/adaptation of the acclaimed post-apocalyptic 2013 film.

The series has been in the works for four years and has experienced delays, showrunner swaps, and even a network move (from TNT  to TBS).

The trailer shows that, much like the movie, "Snowpiercer" follows the passengers of the perpetually-moving titular train, which carries the remnants of humanity seven years after the world has become a frozen wasteland. On the train, the 3,000 surviving souls have stratified into distinct classes — but an uprising is brewing.

Jennifer Connelly stars as a first class passenger who serves as the Voice of the train, making announcements. Daveed Diggs plays a "tailie," who lives in poor conditions at the back of the train. Alison Wright, Lena Hall, and Steven Ogg also star.

"Snowpiercer" is slated to premiere on TBS in spring 2020.

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