The late Anton Yelchin completed recording through the end of this season before his death last year.
He voiced the lead role of Jim Lake, an "ordinary teen-turned-Trollhunter" who faces new challenges in his battle to protect his human-inhabited hometown of Arcadia and the fantastical Troll world he inherited, noted a press release that accompanied the new season's first trailer.
"Jim's risky decision to enter the Darklands unearths startling discoveries, forcing him and his friends to face gripping consequences as they race to end the battle against evil," the synopsis explained.
The DreamWorks animated show is created and executive produced by filmmaker Guillermo del Toro.
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