Former Orphan Black star Tatiana Maslany, Diego Luna (Narcos) and Emile Hirsch (The Chinese Widow) have joined the third and final season of Netflix’s Emmy-winning original series DreamWorks Trollhunters, from Oscar-winner Guillermo del Toro.

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The join the returning cast from seasons one and two that includes Kelsey Grammer as Blinky, Mark Hamill (Dictatious), Lena Headey (Morgana), David Bradley (Merlin), Ron Perlman (Bular), Steven Yeun (Steve), Anjelica Huston (Queen Ursurna), Jonathan Hyde (Strickler), Amy Landecker (Barbara), Charlie Saxton (Toby), Lexi Medrano (Claire) and Fred Tatasciore (AAARRRGGHH!!!).

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Maslany and Luna will voice Aja and Krel, two mysterious new students who unknowingly come to the aid of the Trollhunters team in the fight against Morgana. The duo will also reprise their roles and serve as the leads of the next installment in the Tales of Arcadia trilogy, DreamWorks 3 Below, set to debut on Netflix later this year.

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Hirsch takes on the role of Jim Lake, Jr., originally voiced by the late Anton Yelchin. Yelchin completed his work on the first two seasons and a considerable portion of season three before his unexpected passing in 2016. Del Toro and his creative team found a unique way to incorporate a voice transition organic to the story and create a path for Hirsch, a dear friend of Yelchin’s ,to carry on his legacy and role. Yelchin’s performance has been left intact where possible and some portions have been merged with Hirsch’s performance to complete season three, according to Netflix and DreamWorks.

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DreamWorks Trollhunters is created and executive produced by del Toro with Marc Guggenheim (Arrow, Legends of Tomorrow), Rodrigo Blaas (Alma), Chad Hammes (Dragons: Race to the Edge) and Christina Steinberg (Rise of the Guardians) serving as executive producers. Dan Hageman (The Lego Movie, Ninjago) and Kevin Hageman (The Lego Movie, Ninjago) serveas co-executive producers.

The series features a tale of two fantastical worlds that collide in an epic saga. Set in the fictional suburb of Arcadia, our unlikely hero, Jim, and his two best friends make a startling discovery that beneath their hometown lies a hidden battle between good trolls and bad, the outcome of which impacts their lives forever.

Netflix/DreamWorks

In DreamWorks Trollhunters Part 3 the fate of troll and human civilizations hang in the balance. The Trollhunters are racing to stop Gunmar and the now resurrected Morgana from bringing about the Eternal Night and shrouding the world in darkness forever. To defeat them, the team must seek the help of the legendary wizard Merlin to unlock his ancient magic and unleash a powerful weapon that will alter the course of their lives forever.

Premiering in 2016 to critical acclaim, Trollhunters introduced audiences to the seemingly quiet town of Arcadia and an ordinary kid who embarks on an extraordinary adventure in a hidden world right beneath his feet. The first season lead the 2017 Creative Arts Daytime Emmys with six wins, including writing for an animated program (Marc Guggenheim), directing (Rodrigo Blaas, del Toro), casting (Ania O’Hare, Mary Hildalgo) and a voice acting win for Grammer. The second season received four nominations for the 2018 Creative Arts Daytime Emmy Awards, including Outstanding Children’s Animated Series.