Chances are good you caught the season four finale of AMC's The Walking Dead last night, since the record-breaking night netted 15.7 million viewers.  If you need a refresher, you can check out our finale recap and be sure to share your thoughts in the comments section.  Without spoiling anything for those who haven't seen it, the end of season four was bloody and brutal, with one of the more divisive endings in recent history.  Not everyone made it out alive, but for three cast members who did, they'll be seeing an expanded role when the show premieres its fifth season this October.  Hit the jump to see who will be returning this fall, and be warned that there are spoilers from last night's finale.

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As THR reports, season five will see expanded roles for Andrew J. West, Alanna Masterson and Christian Serratos.  Masterson and Serratos play Tara and Rosita respectively, with West playing the very-recently introduced citizen of Terminus, Gareth.  Each of them have been upped to series regulars starting this fall, so that should clue you a bit as to how the plot might progress.  Tara started out as a member of The Governor's (David Morrissey) group in the first half of season four, then accompanied Glenn (Steven Yeun) in his journey to find Maggie (Lauren Cohan).  Along the way, they ran into Abraham Ford (Michael Cudlitz) and his crew, which included Serratos' Rosita.  West's Gareth is currently overseeing a likely group of cannibals living in Terminus, with Rick & Co. trapped in a railroad car.

As for what we can expect to see in season five, here's series creator, Robert Kirkman:

"Seeing Gareth and Rick and the people of Terminus and our survivors go head-to-head is going to be interesting. There is a very deep, dark and storied history to Terminus and how these people came to be that will be revealed in season five."

Other relatively recent series regulars include Chad L. Coleman (Tyreese), Sonequa Martin-Green (Sasha), Emily Kinney (Beth), Josh McDermitt (Eugene), Lawrence Gilliard Jr. (Bob) and Cudlitz.

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