Hawaii Five-0's Aunt Deb may return to Oahu with sorrowful news.

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Carol Burnett is scheduled to drop by Hawaii Five-0 as season 6 heads into 2016, but her return may come with a double whammy of ill tidings.

"It's closure for her story," executive producer Peter Lenkov ominously revealed to Entertainment Weekly.

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Aunt Deb has featured twice in the CBS drama - once in season 4 to tell her nephew that she is battling cancer and then again season 5 to announce her engagement to a former mob lawyer. While Burnett's last visit saw her in high spirits and good health, Lenkov's announcement harbingers a possibly deadly turn of events.

"If you remember, she got married in Hawaii to Frankie Valli," Lenkov explained. "She's actually coming back alone this time."

Could her husband have lost his own battle with cancer, or is there a divorce in Aunt Deb's future? Either way, it doesn't sound like Steve McGarrett (Alex O'Loughlin) will be regaled with happy tales when he picks his aunt up from the airport.

Find out more when Hawaii Five-0 airs Fridays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' next episode.

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Hawaii Five-O, Television, CBS